I can offer insights from the perspective of someone who hires real estate analysts

Different areas offer varying qualities, but most hold investment potential.

This region is well-suited for MHPs and offers unrestricted land.

I understand you tried that and it was rejected but I think you just need to keep putting offers out there. 

And if they did, I'll offer them 1% and be done with it.

I was looking into a virtual number such as from RingCentral so that I wouldn't have to use my personal cell in any guest communications, but I also noted that many of the PMS such as OwnerRez and Lodgify offer SMS messaging.

I was recently offered mentorship through a veteran's program for commercial real estate.

You could consider offering to have the shower inspected by a licensed professional to provide a written report confirming its safety and functionality to address your tenant's concerns.If your tenant continues to refuse to pay rent, you may have grounds to evict them for non-payment of rent.

Both have their own unique advantages and can offer great potential for real estate investing.

Selling can unlock equity for a larger building, offering diversification and potential higher returns, especially in the current strong market.