I take all of the tenant calls, do all my own taxes and do almost none of the physical work.

Some sort of management courses would also be useful RE is not only managing a physical property but tenants, handymen, skilled tradesmen, etc.

(There are other ways to obtain/develop that evidence - such as using certified mail or my “practical advice” below.)In your case, because your friend found the letter inside the mailbox of the last known address, you now have specific evidence of having mailed the letter “…by first class mail, to the tenant's last known place of residence” - “Unless other arrangements (had been) made in writing by the tenant…”Again, in my (non-lawyer) opinion, you’ve complied with the letter of the law as to your concern - “Unless other arrangements (had been) made in writing by the tenant…”[Practical advice: Where I self-manage, in my “Notices” section of the lease, besides my physical address, phone numbers, etc for notices to me, I provide two email addresses for myself, and state in that part that email is my preferred method of communication.

Pick up an algebra or quantum physics book if you know nothing about algebra or quantum physics and let me know how long it takes you to figure out algebra or quatum physics on your own.

Any recommendations on structural engineers that won’t drain my wallet?

He has had a physical altercation with the boyfriend of this couple.

It sets you apart and actually gives clients something of value rather than simply seeing them as a wallet to get into.  

I put my phone down on the counter to get money out of my wallet and the clerk picked it up. 

Given how badly Airbnb has managed owner relations, we have made a hard pivot to adding as wide a distribution net as physically possible.

After an intro call and vision board, intro to strategic lending partner, four physical tours, two offers on two properties (with the second accepted below asking price) a quick inspection with (minor inspection issues resolved by seller), appraisal waiver and below market rate lock..