I personally like the rehab estimator on here.1.

Opex ratio: Is 35% of revenue a solid assumption for operational expenses - insurance, maintenance, etc? 

If you can't keep control of your personal finances, you are highly unlikely to succeed in real estate investing.

If anyone has any recommendations of a good first-time buyer market, personal experiences, etc.

And then 2nd day another person visited for inspection and said they need to remove padding.

Can we stop renting our house hacked property after one year if we want it wholly for personal use?

This is the person who ensures the implementation of the overall strategy of the business.In the mobile home park investing niche, I have found a near-limitless opportunity in underperforming parks.

Wouldn't invest in that area, personally.

For every 1 solid GC there are 9 phonies out there.  

Before the late 1970s there were no real estate gurus, no real estate investment courses, no house flipping TV programs, no real estate get rich books, no real estate investment clubs, and what experience the general public had about real estate was limited to buying their personal residence.