Quite often their skill level is lacking and/or their self discipline to actually, well, work.3. 

Given your interests in engineering related disciplines I would focus on financial engineering concepts and financial efficiency. 

Here is how I would set up my housing as a brand new LT.If you master the skills of real estate, and more importantly the discipline to stick to a plan, you could retire from the military and never have to work another day in your life.

The deposit covers cost AFTER they move out...... its not a bank account....... you have every right to repair damages while the tenant is still living there and charge for those damages NOW.I would point out the writing on the cabinets and provide them an estimate for repainting the cabinets...... and do so for any true damages that are evident now....They obviously don't supervise and discipline their kids very well.... you wont change that..... the only hope is to make it hurt by having it cost them $$

There is a transition point where you have to balance both (with a strong will, determination, DISCIPLINE, and sacrifice),  and only then, you can make such a leap.

Development involves and requires a knowledge of and ability to "speak" and relate to every professional discipline associated with executing a ground up development.I have met exactly ONE architect during my 50 year development career that had an in depth knowledge of how a deal is put together.

I had a handful of cashflowing rentals a good w2 and not enough self discipline. 

The big mistake I see almost all newbies make across multiple disciplines is they buy first and plan to work after.

You first eliminate your debt then concentrate on saving and investing to grow wealth.As long as you have debt you lack the discipline required to be successful at money management and investing.Start the process by clearing your debt. 

That book helps people learn discipline when it comes to managing their own finances and I would recommend it to everyone has a good starting point.