I've had about 3 inquiries asking if I accept Section 8.

Inquiries can have a negative impact, so you don't want any 'hard pulls' on your credit unless absolutely necessary.

Do not count on their "up to 30 days", it's likely that they will send you another letter stating: "We were unable to resolve your inquiry within the thirty days (30) as stated.

Don't hesitate to shop around either, all mortgage inquiries on your credit within one week will count as only one inquiry.

We use a property management software that syndicates our listings to 20+ marketing websites, and we get inundated with email inquiries.

I put in an inquiry on Lending Tree and before I could hit send I was inundated with phone calls and emails from online entities that I've never heard of. 

I put in an inquiry on Lending Tree and before I could hit send I was inundated with phone calls and emails from online entities that I've never heard of.

Is there a template or standard letter of inquiry for a property owner whose taxes are delinquent? 

If they balk when you increase the rent let them know that their inquiry triggered you to check the local rental market and that you are actually below market rate. 

In your area, you might consider https://emeraldcoastbyowner.com - a number of hosts that I'm in touch with report good results.I'm further south (Tampa Bay) and also list on https://www.floridarentalbyowners.com/ and https://www.floridarentals.com - have had some inquiries but no bookings yet.I'd also recommend getting your own web site set up so you can accept direct bookings, particularly from repeat guests - we've been doing this for a few years now and our repeat bookings continue to grow year over year, and having a direct-booking option has worked well for us.If you're not interested in setting up your own web site and booking back-end, maybe take a look at https://www.houfy.com/ set up a listing and refer your repeat guests to your Houfy listing.