I wouldn’t mind flipping some properties in between, but that would be just a bonus if I can and not really part of my long term strategy.

Your welcome to come out and meet some like-minded investors.  

I was hoping to find something very clear online about what it actually means more specifically, but am having no luck.So normally, under that standard languaging, if consent is requested to assign a commercial lease, does "performing a standard screen/background check on the new would-be tenant, as if it were a completely new application for an unoccupied space" count as something I can legitimately do?

Keep in mind that you're competing with people who can pay cash and have a track record to closing.

After buying - by chance - a 'high cash-flow' apartment as first property in Malta, my husband and I realised that Real Estate Investing could help us reach our goals: financial, geographical & time freedom.We are already working online, allowing us to travel frequently for long periods of time.

It's not a binding contract until there is a "meeting of the minds".  

Initial question that comes to mind is how they can obtain down payment to buy a new house given their equity is tied up in their current house.

I don't mind assisting.

Also, keep in mind when comparing to other properties that you'll still have to pay for the paint, flooring, and other improvements, and your time may be cheep, but you have to value it when making your decisions.

Yea I am working hard and reading a lot which has opened my mind in ways to properly invest my earnings.