We ended up saving more than our fair share considering this was in 2021 and sellers were getting 20 offers all above asking, we were able to buy below market value.

Here are some favorites among real estate investors:"Set for Life: Dominate Life, Money, and the American Dream" by Scott Trench: While not solely focused on house hacking, this book offers practical advice on building wealth through real estate investing, including house hacking strategies."

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.