The ADU would then be used as a long-term rental.Does this qualify as a “like-for-like” property exchange even though I’m technically not buying another property and does a 1031 apply?

My company now just me and two staff and we are about 20 mil in short term JV deals with higher profits and what most would think is higher risk. 

Go to Meetup.com and type "real estate" or "Apartment Investing" or other search terms for your area.  

My long-term goal would be investing in large scale hotels, I know I know, that's quite ambitious, but I don't mind starting small and working my way up there, as long as I start from somewhere!

I do pretty much like more SD than SA, but as you asked, the money that I have to invest it aint that much, goes between 30-40K to start and will be definitely for long term, as I said, I´m a beginner in this business in the US, as commons says I´m at the baby steps stage right now.

I also use their virtual credit cards which enables me to assign a card to a specific person, like the cleaner for my STR for example, so when she runs a charge, it automatically drops into the right account in terms of categorizing my expenses.

The only time I'd say it's an okay idea is if either: The area you're investing in is expecting so much appreciation that you will easily profit off that (watch out for mortgage interest though...the appreciation needs to be higher than what you pay in that and expenses to make it profitable)You have some specific reason for wanting to do it- family ties, future home, major long-term hold, etc.Maybe I'm forgetting another one, but those two are all I have for now...

I have 2 flips in progress and 6 long term.

I don't know how that business could survive long-term with such low rates.If those numbers are accurate and you can net $38,000 a year, then it's worth holding onto.

Short term tenants are not protected by the the eviction ban.