We try to get almost all the stuff we can at thrift stores, shin guards, cleats, black sports shorts, soccer balls, helmets, gloves, socks, pads, all kinds of things can be bought for pennies on the dollar. And soap works, if you don't trust your laundry detergent then add a tiny bit of bleach to the load.
Okay, in Oklahoma:::
Football is the most expensive, $50 for sign up, $50 for uniform rental, includes pads and shirt, not pants or shoes from what I understand. So for $100 I get to buy some football pants in the right color, cleats, and he gets to play.
Soccer has scholarships pretty much across the board but it depends on the club policy. One fee is $45 and they will do all but $15 (that's for the insurance). You have to have a letter from the school that you get free lunches to verify income. If you don't get free lunches check into that for your kids, if you pack a lunch I don't know what else they might accept, still...free lunches are cheaper in the long run. The other club only does scholarship for 50% of the cost, that way they can spread the money further. I still have to have cleats, shorts and soccer socks if they only wear a team jersey or otherwise the money for a uniform and socks. One of my friends kids has been on the same team since starting and they are good about passing the uniforms down to kids when theirs outgrow them. He daughter was on a couple of different teams and she had to buy a new uniform each time, our girl had the bad luck of getting a bad coach each year and they left after each season so we ended up buying new stuff each season, twice a year if she plays both Spring and Fall.
T-Ball and softball (Don't have boys old enough for baseball yet but they play at the same field). If you go through the "Y" then you get a huge discount if you are on scholarship. The regular membership fee for a family is $45 per month, on scholarship we get membership for $23, any classes/sports we sign up for are 50% off the member fee. So if Soccer, T-Ball, Swimming Lessons, Basket Ball, etc...are $40 for non members and $20 for members then we get the same thing for $10. The Y, on scholarship is worth every penny we spend.
We do play some of these sports at a local club that only has scholarships occasionally. They work so hard to do them but the money isn't always there. They do fund raisers every season too, that helps build the bank so that next season there may be money for those who need it.
Call the local clubs directly and see what they have available.
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An addition:
We do BMX, it is sort of expensive but so worth it.
The biggest all at once cost is about $45 per year for a membership card to the National organization. That gives the person the right to race on any of that National organization's track in the USA and Canada. The ABA has over 250 in those areas. They are merging with another organization at the end of this year so that number will increase buy a lot.
Once they have their card they can go to any track that is having a race and can pay the daily race fee and ride. You have tracks nearby in Goodyear, Surprise, Phoenix, Chandler, even 2 in Tucson. You have to have a helmet, you can often borrow a bike at first then build one or buy it from a growing kid, and long sleeve shirts and long pants. There are special knee pads and elbow pads for the hot climates and they run about $25. The track will often keep loaner helmets too. They want people to come try it out. It is so much fun and is now an Olympic sport. They can get scholarships for college and other recognition too.
Here's a link to the ABABMX website with the tracks in Arizona. You can travel every weekend or do it occasionally. It's up to you. We spend about $10 per weekend for the race, called a Moto, and we have the option of spending less, she just wants a trophy if she wins instead of a ribbon or savings stickers. We race in Oklahoma and have about 5-6 tracks now. More open all the time, plus we have Grand Nationals in Tulsa each November.
http://www.ababmx.com/index.php?page=default/tracks&s...
We pay about $130 per month for gymnastics, hip hop, tap and ballet combo, and show team at the local dance studio/gymnastics business. I work there to help pay some of the cost but it is really easy to add classes after the first one that is $50 per month, each class added costs less and less.