James, the wait time for an STR inspection is months so as Jordan said, get in line early. Are you planning to live in the house and then rent is as an STR when you are not there? If you do not plan to live there, that's not a Type 1 license. Cost is $650 for a license from the City. Also, make sure your house is up to code as they will send an inspector.
With regard to homestead and taxes, yes you would lose this if not your primary residence. Also, keep in mind that your property taxes will jump to the county assessed value each year. If the assessed value jumps by 25% in 2 years, you pay the full amount - no 10% annual cap.
As for revenue, be conservative. Airdna will tell you that average occupancy is 63% in Austin but make sure your finances work at 50% or less. There are more than 9,000 STRs in Austin, of which less than 2,000 are licensed STRs. Read this article for more info on STR investing in Austin. https://www.atxnext.com/post/a...