He may not itemize these extras and scraps in your materials costs along with various fasteners and adhesives.  

So if there are tenants in place when buying a property, you are bound to the agreements of the prior lease unless there is a clause that allows a lease to break upon sale.

This is similar to the way a bank will determine the prepayment penalty if you pay your mortgage off prior to the end of maturity.

It's a month to month lease, I did not indicate 30 days anywhere in the lease .I just indicated tenant needs to provide a month's notice prior to vacating and that month could be anywhere between 28 to 31 days depending on a leap year or non leap year and typically I wouldn't have bothered at all about notice if it was an emergency situation such as a job loss or a non-pandemic situation.

I never show to a prospective tenant until they have qualified (last step prior to CC and BG check).

.), where hosts have full control of payments, guests are actually required to read and sign OUR rental agreement prior to booking, and property managers or hosts with multiple listings have dedicated account managers sounds like an absolute dream come true. 

Surprisingly I know LL's who do not screen; they don't even verify employment or prior LL.

If the records show the tenant was not paying rent prior to COVID I would then send a notice terminating tenancy.

If it is a prior company 401(k) plan, then you would have the ability to roll that over into a self-directed plan.With a self-directed IRA, you can invest much as you are able to with the self-directed DB plan you participate in.  

As I mentioned in my response to @Rebecca Bautista , the HOA covenants ,fees and efficiency are something that should be researched well prior to investing.