Holding LTR in san diego on a new purchase is challenging not to be large negative at high LTV.  

House HackAttend as many REI meetups as you can to grow your network of investors for referrals, help through challenges you may incur but don't have experience with, and learn from proven guest speakersNetworking app like blinq to compile all of your contacts for REI in one area with phone and emailbegin conversations with local credit unions exploring what type of loan products they offer

Very challenging if not impossible to make lot ratios work if the existing property isn't conducive. 

I’d love to hear your thoughts, especially if you’ve seen these challenges in your market or have insights into how STR investors can navigate this potential shift.

Mind you, with mortgage interest rates in the US being so much higher now (and seemingly for the foreseeable future), I wouldn't be surprised if LTRs in Europe would cash flow better than in the whole US nowadays (to be verified).This being said, I don't and would never invest in LT rentals outside of North America  as I wouldn't want to face unfavourable landlord/tenant laws as a foreigner.

There's a good chance the issue(s) you face has already been discussed and answered.Ask questions in the appropriate forum.

We appreciate your support and understanding during this challenging time.A medical note attached simply says "1 year leave from school for medical reasons"Please advise on what is the best recourse in handling a situation like this?

If able, speak to them face-to-face at their work, your kids soccer game, church, whatever.

Challenges?

Knoxville I would consider a different market demographic entirely and I don't have any insight there.I would caution against taking your realtors word at face value.