1) Research Zoning of similar property2) Do search with same zoning criteria with propertyradar or have title company give you a list.3) Possibly filter by satellite photos to eliminate undesirable topography.

And there is a laundry list of existing professionals in this space to replicate from. 

I’m not from the US and currently live in Europe most of the time.I’ve found some apartments that could work well for my needs—I plan to rent them out on Airbnb and reserve a few nights for myself when I travel there for work.My question is: apart from the purchase price (I’ve seen listings on Zillow averaging around $150k in areas like downtown Dallas, Old East, and Plano), what other costs should I expect—both during the acquisition and in monthly payments?

I could likely see many things from the TCJA being made permanent, mostly procedural items like the higher standard deduction and child tax credit (Plus eliminating exemptions).

And if you’re listing the house online, try platforms like LoopNet or local Facebook groups for real estate or community housing.Just make sure to do your homework and ask for references, check their track record, and make sure they’re following any local zoning or licensing rules.

A good attorney will even warn you if you are doing something illegal.As you can see from the list, a wannabe or "self taught" or poorly trained by videos or in a "community", does not provide the breadth of knowledge & experience to keep people out of trouble. 

Gross profit is interesting because it appears to just be the difference in his acquisition and sales price and fails to take into account the other obvious cost of running that business which includes, again according to him, the cost of over 26,000 letter print, mail, post, and the cost of the lists needed to create a mailer of that size. 

My first MF I represented the buyer on I made 100k. for maybe a weeks worth of work. 3. if your going to be looking a more resi style duplex 4 plex a lot of those get listed and having access to the MLS is far superior to any other on line listing service ONE simply because you will be able to talk to the actual LIsting agent not someone paying for leads.And then of course having access to MLS lock box's and not relying on agents.. this is huge.Now if your maybe going to buy one property sometime in the future and you have no interest in learning the RE laws of your state or making any money with transactional real estate then sure.. its a pass.. although I would still recommend the pre license course so you learn the basics  the vocabulary and states unique laws.. knowledge is power in RE.

You may want to get in touch with some realtors in whichever markets you are interested in that specialize in off market deals (pocket listings) and who are also "investor friendly realtors," not just ones that want to off a garbage property to you.

I would like to pass on a little bit of useful information for anybody thinking of converting their permit over to owner-builder. 1 - You will not be able to sell the property for a minimum of 365 days from the date of issuing of the CO. 2 - The property must be for the owner's own use and occupancy and not for sale or lease which means you will not be able to rent it out. 3 - The owner-builder must ensure that all employees working on the project have the required licenses.4 - The owner-builder must provide worker's compensation as required by Florida law.5 - To apply for the owner builder permit, you must physical visit the building department.There are others requirements and conditions, however these are the main items.