It's relatively easy to sell land with owner financing, and so far I haven't had any trouble with collections.

They likely collected these upfront to determine the best loan product (likely wanted to compare with a full doc loan).

If there are common areas in the commercial property, then sure you would need to do the accounting regarding who pays what and what's collected among the various tenants. 

Without knowing how long your process takes in your state, the best I would do would be to offer to loan her the money at some interest rate, and still follow through on collecting everything she owes.

(Agreement with your client that grants you the authority to collect on this alleged debt.)

If someone had an "event" in their life (illness, divorce, etc) then we may be willing to accept that, but if someone has had their vehicle repoed, they have items in collections, and a history of late payments, we'll pass.

According to Opendorse:The collegiate NIL market is projected to grow by more than 40% this year, with an overall estimated market spend of $1.67BThe collegiate NIL market is projected to eclipse the $2B mark in tandem with the highly anticipated revenue sharing slated for the 2025 academic yearIn the commercial segment, Women’s Basketball is in the number two spot for total compensation, second only behind FootballBy 2025, Top 25 NCAA DI quarterbacks can expect to net more than $1.3M annuallywhen factoring Scholarships & Benefits, Commercial NIL, Collective NIL, and Revenue Share paymentsCompetitive collective budgets within Power 4 conference are up 50% YoY, amassing to a war chest of $13.9MWhat schools have the top NIL Budgets?

The next hard part is collecting. 

I'd like to build on it (if anyone familiar with the area has a contractor they'd recommend I'm collecting names!)

Also, focus on 2 years of job/income stability.Class D Properties:Cashflow vs Appreciation: Typically, all cashflow with little, maybe even negative, relative rent & value appreciationVacancy Est: 20%+ should be used to cover nonpayment, evictions & damages.Tenant Pool: majority will have FICO scores under 560, little to no good tradelines, lots of collections & chargeoffs, recent evictions.