You haven't even asked about your BIGGEST challenge - finding "trustworthy" contractors.- Most contractors will cut corners, or worse, once they figure out they won't be watched closely:( Your job will also go to the bottom of their priority list.Monitoring progress is relatively easy: hire that same inspector to go by weekly or before any payments to take a VIDEO of:1) What was done2) Quality of workmanshipOne other thing you didn't ask about, payments to contractors.- They all want 50% down or as much as they can squeeze out of you. 

That might be the biggest hurdle - but otherwise, I'd check out "DSCR Loans" which are the perfect option for people like you looking to buy rental properties w/o W2 or DTIWe don't own any other properties other than the investment property we just purchased.

What have you seen make the biggest impact ? 

Stick to these tools, and you should be significantly happier with your next renters  Thank you, I did screen all aspects and everything looked good in the beginning but the biggest problems seems to be the renter big off more than they can chew.

The biggest tip I can recommend is patience.

The good news is that most of the businesses are moving to Texas which is the biggest hurt that they can put on the state.

My biggest concern with ADU’s on single family lots is that all the new laws have muddled what the long term value looks like, and most people don’t realize it yet. 

I recall reading in Forbes that major foundation fixes can add surprising value, becuase it addresses the single biggest fear buyers have.. a shaky structure.From my three decades in fix-and-flips, Ive noticed how important it is to have a team you trust.. from attorneys who know probate deals to realtors willing to drive for dollars with you, scouting hidden gems.

CRREIA is probably the biggest meetup locally, I went once and would love to go more.

Biggest mistake I made was not keeping 50 or so more of the 500 I flipped, cost me millions, All the best  My last 3 multi families 2429 nw 81 3/2+ 3/2 purchased at 385 October 2441 nw 81  3/2+ 3/2 purchased at 400 October 441 nw 44th 3/2+2/1 purchased at 280 August again there’s deals , you just have to look.