You’ll develop resilience, leadership, negotiation skills, vision, emotional control, and more.

Again, I speak from experience. my limited experince at this is a trier of fact will side with the land owner most all the time.I bought a tax sale prop in CA .. these are tax sales not tax certs. 

It sound like you have your area under control. 

RE is always changing and if you have only one niche then well your limited in opportunities and subject to the conditions that exist at the time for that strategy.  

Sometimes the tenant just doesn't know about them or their situation limits their ability to apply.

Less waste, more controlled environment, less surprises. 

Full gut renovation, including but not limited to full replumb, full rewire, complete mechanical upgrades, and new apartment finishes from studs.

If you want to develop it, I can refer you a lender that will lend on a completed subject to appraisal but you'll be limited if you just want it for the lot.If you simply want the land as part of your property, you have more options including a HELOC which you can still use for development down the road. 

Many lenders will limit to 65LTV for Foreign Investors, but there are some exceptions who will go to 70LTV or even 75LTV. 

It gives you the flexibility kind of like a credit card that allows you to borrow a certain limit and withdraw funds as needed.