1. "Lease to Own option": essentially means you are leasing the how with the RIGHT to buy the property after a certain period You are not required to buy it but you may buy it at the specified price at the time of maturity. (Lease purchase would mean you are agreeing to buy it at the end term)
2. Subletting just means you go through the normal procedure of renting a home and then you just move in another tenant to cover the rent and a little bit of a markup. I'd recommend getting under market rental units. "Lease to own" means you'll lease for a time to eventually own it. as subletting means you will just rent for a time with no option to buy. "Lease to Own" usually involves a premium up front and even a higher markup in the lease as opposed to a rental because you have the added advantage of having the right to buy (like 20% in some cases but check your local market and professionals to be sure).
Subletting: I.E you rent a home for 1000/mo for 1-2+ year terms. you can get a sub-tenant for $1100+ depending on market which is a 10%+ ROI per month
Lease to buy option: I.E you lease to buy option a home for 1000/mo with the option to buy it for 100K at the end of three years with a premium up front of 2K. You can get a buyer to lease the same for $1200+ and charge a premium of 2.5K-3K+ and they can purchase the home landing close but after your purchase at 110K. that means you made a net profit 200+/mo (20% ROI), 500-1K premium (25%-50% ROI), 10K resell (10% ROI).
If they dont buy then you can come out of yours as well or you can just start up a new one. and hey you might have the added bonus of appreciation at that point.
Real investors make the money at the beginning. So go for a good deal first. you'll do fine.
if you need further help putting subletting together let me know. Ill help.
3. Hard money terms is up to the hard money lender. They'll let you know. The point of hard money is not the rates or the price. It's the convenience. Fast, no checks, and usually based on the value of the property. I would use hard money to get the many deals you want. Make sure its enough to cover holding costs. wait until its seasoned in 6 months and then refinance with a traditional loan. If the deal is good enough then you should have very little risk doing it. it's just another tool.
4. I can help you in wholeselling if you want its one of the low risk capital building techniques. its just you finding deals with enough of a profit for you and another investor to get it off you at a win win.