I did check out the Market Maker feature though, and I feel like it's somewhat OK.

Learn your market and learn to market. 

If you use a HELOC, I would think about a BRRRR-ish strategy (No perfect BRRRR exists right now unless you go full off-market door knocking/postcard campaign/etc) to where you can refinance and get some of that money back, so you don't have $25k chunks of money at a 9-10% interest rate floating out there indefinitely.

There is a stunning luxury STR on market that would generate six figures in gross annual income.

Great ideas, i've stayed in some cute campers on air bnb in some expensive markets.

This helps reduce operational costs and increase efficiencies, hopefully giving the landlord back time to spend on other areas of the business.Market Trend Predictive Analytics: There are AI algorithms that can analyze large amounts of data in order to predict property values and future market trends.

If they want an off-market property, I even built a BRRR calculator that they're using to feed-in the numbers from the 'B'uy all the way up to the final 'R'efinance part. 

There are DSCR lenders that do not use a market rent 1007 and will use rent range to determine the rents.

Any tips? 

I expect my Florida market will be hopping soon.