Yea, I feel your pain, but I would forget the thought of "traditional" lines of financing for the time being. Some thoughts on hackfinancing:
1) Set up an organization website, profile and all the relative legal structures prior to actually quitting your job. Determine cap ex and operating costs upfront and use them as a barometer of short and long term financial viability -- don't forget to include your salary. Identify all the costs that can be extended over the long term (for example, artificial turf that can be bought under letter of credit from the manufacturer). This all does take quite a bit time and after the paychecks stop coming, the urgency to get the show on the road is on. Save yourself much of this by starting now.
2) Develop a community of soccer enthusiasts by asking them to get on an e-mail list on your site and/or collect them out and about in different places.
3) Develop a community of businesses in your local community that would be interested in supporting your organization once you get off the ground. Use a free CRM tool to keep track of your relationships and be relentless about setting up the ground work and pounding pavement early. Do the same with family and friends.
4) Develop a program based around a specific operating season that invites team captains and corporate sponsors to buy into the league's founding year at X costs. Use the team captains as your primary vehicle for driving the membership model for your initial run. Promote shamelessly to corporate citizens with various contribution levels and use the organization's structure and initial interests to drive participation.
5) Take the participation metrics, financials, organization's structure to the equipment suppliers/manufacturers are request special financing terms that will allow you breathing room to lengthen your operating horizon given the special liquidity situation you're currently in. Pay hard cash for only the essentials necessary to keep the concept moving forward. Take a similar approach and now approach your target locations with a sound proposal for renting the space, with allocations for build out (most available with property improvement assistance from the landlord if they have the resources). Seek probono assistance from a commercial property managers interested in the project on how best to set this up and approach the landlords. Do so ONLY after all the steps above are completed and documented to confirm how you intend to run the enterprise.
Additions:
Seek friends and family financial assistance for net difference by allowing them to become founding partners in the operation - granting options or stock (under the allowable limits as determined by the SEC).
Sell yearly "pickup" game passes for specific day of the week pickup games on a membership plan.
Host weekend day birthday games for kids (see how climbing centers do this really well). Sell 10 pack kids party tickets in advance to parents to build up cash.
Set up and host summer camps, sell passes early.