This sort of thing is done all the time. 

@Matthew Reum there are all sorts of ways to find good deals.

You might be able to convince a seller to hold the mortgage note (ie seller financing) and have you pay them in regular installments, but even in this scenario the seller would typically request some sort of initial down payment.

It would have to be a "rent by the room" situation of some sort. 

You can get on betcoinc.com.they have all sorts of information. 

And lastly, we all want to do everything in our power to help our clients and customers who come to us for guidance and support but sometimes certain situations are just too complicated to sort out on your own especially as a new agent, although I believe that no problem is impossible to resolve, we must understand that in certain situations it is better for clients if you simply referred them to a more experienced agent.

Sellers have to asses odds when choosing a buyer (do they have a good broker and support system, do they have the funds ready to go, is their proposed loan terms reasonable for the market are they trying a hair brained loan that has a little chance of happening?)

This requires some sort of licensing depending on your state and typically is paid based on commission.

While LLC's are an important protection, you should always be managing your properties in the best manner and not creating any sort of opportunity for people to have claims or grievances against you. 

I see you are looking at all sorts of strategies, from land to tax liens - to start I would suggest to keep it simple and basic.