Then you add the the ADU and now the owner occupant and the investor would both pay $1M or even $1.1M.

If he's a vet, I'm sure there are resources he has access to that others don't, in addition to the regular places for support (eg local church). 

Also, any tips in valuing and selling the empty lot?

Now I just want to be sure the best path to take with the profit earned or if I should save more capital.  

The contracts were not editable online, and I couldn't access the webinar recordings.

We've been told by a local appraiser and real estate agent that the property should now appraise for $1M+.We took a private loan from a family friend at $250,000 to purchase the property.

Any other tip for this newbie in the REI world?

@Ana Vhan even if you do what @Nathan Gesner recommends (which we also recommend), you'll want to add to the lease as you get experience.Our lease started with 6 pages 24 years ago and it's now 26 pages!

You lease it for whatever you advertised it for on the initial term and jack it up to the maximum a year for now when they renew.

What I can tell you is that I specifically got these locks because they appeared to have the most third-party app integrations, so I wouldn't be limiting my PMS options if I did move that direction in the future.For now though, I manually update the lock codes for each guest ahead of their arrival, which takes about 90 seconds in total - super quick and easy.