I'm curious too. Why do you need portable hoops? then someone is responsible for moving them all the time and you risk damage in the event of weather or vandalism.
Lowe's
www.ToolBoxforEducation.com has a grant program, but you will have to wait for the October contest since the February deadline already passed. But if you are looking for something in the near future, what about a Super 50/50. Limited ticket sales $50.00 each ticket. Selling 125 tickets would gross you $6250 and after splitting it with the winner, you get $3125.00. Sell them all around school, town or to relatives all over the US! It's easy money and you will have it before the end of the year. Also, work out something with a local sporting good store as the other poster stated. Maybe get a discount on top of your tax-free perk in exchange for their store name being a sponsor on the ticket. That would reduce the number of ticket you have to sell or the ticket price ($50. in our town is not a difficult sell, but in some towns it is)
But looking long-range, you may want to check out getting permanent hoops outside.