It's like going to a car dealer and asking how much some add-on option costs and they tell that you have to buy the car FIRST, and then and only then they will tell you the cost of that add-on.

I currently have a single property and plan to add one per year, over the next several years. 

You've got a ton of great advice above so I don't have much to add on that front....Yes, use VA loan to house hack. 

Modular homes can indeed come with garages, either pre-designed or as an add-on, depending on the company you choose and your specific design plan.Companies and QualityThere are numerous reputable companies that produce modular and manufactured homes  Examples, 1) Blu Homes, 2) Clever Homes, 3) US Modular Inc..

Not really sure what else to say but look at the numbers, what would you say differently or add on if you were to try and explain to someone that this was a bad deal?

So, my guess is it's mainly due to the high humidity. but every contractor that came in and hear the word "mold", immediately add one more digit to their quotes.The reason I agree to fix it is because the tenant claimed "breathing" problem.

So, it's best to go hard on the google my business, social media, some have done Facebook ads, and email/text marketing.Due to fees the OTA's add on for the guests, you can actually raise your ADR a bit on a direct site and still come in cheaper.

Based on my research, I know to add on capex, vacancy, etc.

Add on not having to potentially pay capital gains tax if it was a personal residence for 2+ years.I vote sell the house.

I'd also add on you could start wholesaling/cold or warm calling.