One young agent said "I am not doing double the work and only get half the pay". 

I would have to double check with the lenders I work with.

The market went absolutely wild (like everywhere) and over the past few years our taxes more than doubled on some of our houses.

Double check the assumptions.

Rents are moving and I would double/triple check so you are super confident in the rates. 3) Insurance seems low at only $3,000 per year for 14 units.

(Both that you know about now and that you are told about form your buyer’s inspections.)Most buyers are going to discount their offer by double what they think it will cost to repair what they can see plus the “mystery repairs” you’re hiding with your as-is sale so you will make much less on the sale. 

The number of STRs in that community have doubled in the past 18 months, the HOA reports 160 operating there. 

For the 10 year period spanning August 2014-2024, single-family prices in Austin nearly doubled, yielding an annualized appreciation rate of ~9.5%.With inflation nearing its 2% target and signs of a slowing labor market, The Federal Reserve is predicted to cut rates as many as three times before the end of 2024 (see here).

Are there any specific things I should double-check or potential issues I should be aware of?

No tenants - No turnover, evictions or chasing rent.No liability - No worries if a homeowner slips and falls.Secured - the investment is secured by real estate.Insured - unlike a stock, the collateral (property) is insured.No taxes and Insurance - Homeowner pays and TI is typically escrowed with the servicing company so no need to track.Notes are typically more liquid than rental real estate.Consistently higher returns - Typically double digit.Scalable - easier to manage several hundred notes versus several hundred rental properties.No HOA or COA - homeowners must pay directly.No property management costs - instead we pay a fraction to a servicing company to collect payments.