As to the quandary posed by the OP: The root of the issue is that it basically sucks to be an RE investor these days.

Yes, companies allow mortgage deductions from a savings account without issue. 

This likely means fewer issues with payments and property upkeep. 

I have two properties where I ran into this issue.

Hi Jonathan,Jay’s Fencing (209-847-3992), Elite Iron Fencing (209-968-6685), and Fletcher Fencing (209-662-8298) are solid options to get bids from and compare.I also offer consulting services to help clients navigate projects like this—whether it’s evaluating bids, ensuring the scope of work is clear, or helping you avoid potential issues during the process.

Quote from @Robyn Henderson: My family's 3 unit prewar building in Brooklyn recently had plumbing issues and I'm debating renovating each of the bathrooms.

Could get creative to, maybe issue shares or something.  

There's a good chance the issue(s) you face has already been discussed and answered.Ask questions in the appropriate forum.

The only issue with seller finance and resale is if they don't want to receive a payoff in short order, then they should include a pre-payment penalty. 

Taking on issues the seller is not willing or able to cope with can score you a better deal.