A short term CD or something like that.

Would you share 3 specific things I should do during my "training period" (if it includes a book, which one)?

Those things can and will hurt your monthly KPIs occasionally and sometimes for long periods. 

Tax deductions / write-offs should be a second concern.There are some rules that you need to follow to treat a short-term rental as 'active'(non passive) income which would allow you to offset it against other forms of income such as rental income / wages.

That is amazing -Where did you manage to double the value on an 8 unit in a short period of time 

We funded tradtional turnkey and we funded those that would do the lease option after i bought the asset for them they paid me off short term 60 to 90 day deals on my side.. then they would go the lease with option to buy..

I do a combo of short-, mid-, and long term rentals on the northside of Chicago and surround suburbs.

Short-term rentals of non-owner-occupied properties will also require a special use variance which is obtainable by starting with the completion of an application in the Zoning Department."

Purchase price: $178,000 Cash invested: $10,000 primary home own use has an Airbnb/ short term rental 5 months out the year/sometime this year will try BRRRR

Typically, you can only do one rollover per 12-month period (again, IRS Publication 969 has the details).In the end, having the option to invest your HSA funds is usually a better bet than letting them sit in a basic savings account.