I would love to connect with you and see if I could provide value. 

He also said insurance and taxes can be too high eating DSCR loan with current rate and I will make less money than Ohio and Kentucky state (example).

Nick Hubbard Senior Loan Advisor  is this  true ??

We loaned $900,000 on the for the refi and 100% of the rehab budget.

However, the examples you provide that “changed your mind” about success of absentee business ownership are either not business ownership but real estate ownership, or not absentee but multiple unit active management.  

Could anybody provide me with suggestions for promising investment areas or any other advice?

I think self management would be very doable for you and your spouse provided you either buy decent units or get them renovated quickly minimizing the need for time consuming repairs.

For buying a second house, should I declare high taxes again or save for a 20% down payment to qualify for a loan based on my active income, without needing tax returns?

This could be worth it if your investor were adding value beyond providing the money.

I have not worked with anyone who does DSCR loans.