Many of the entry level homes saw $100k of appreciation last year.

Also look for the requirements to evict (a/k/a, forcible entry and detainer suits). 

With such a low barrier to entry, it attracts a disproportionate percentage of bad actors.

Can I then ask the investors to sign this form every 90 days (a lower barrier to entry as they don't have to interact with a 3rd party, which can take several business days) and find a 3rd party to accredit our fund every 90 days with both the initial accreditation letters and the signed forms from each investor?

Probably under 1k to replace the entry flooring.

Future plans to cosmetically renovate 2 of 3 units, enhance curb appeal, and add modern touches (keyless entry, smart thermostats, etc.).

That's a higher entry point, but the ROI is there. 

The barrier to entry is very low! 

For a long time I saw price out here as a barrier to entry and was more keen on out of state markets but have since learned enough about creative ways to finance that I made decision to get started here because of my understanding of our local market.

As you grow bring on an assistant to help write offers and do the data entry tasks.