Car is similar like house, the more quantity the better.

You have to make sure that their goals/objectives is aligned with the client.

Kailey Schiesl objective, unbiased evidence is almost always the best route to go.

I managed a dozen properties just fine but the reasons I use PM’s..They have a list of repairmen who will work on their repairs first, regardless of demand, will give them quantity discounts, and want to make their largest customer happy. 99% of the time it will be fixed the day it breaks. 

Speak with a realtor and clearly state your objectives - a good one will pull through.

Yes, they offer different analytics however the underlying  objective is the same,  I use Airdna only when I know and I am sure of the area and zone I am interested in investing...

There are no accessibility codes for residential housing so the objective should be to find a best house needing the least amount of modifications to meet the tenants needs.

You will get objections to the fee and you may get less calls.

A common objection to Sub to is that is triggers the due on sale clause of the seller's current mortgage.

Don't jump around from one shiny object to another, stick to one strategy and be consistent.Read Biggerpockets and ask questions.