Things I have done:I'm researching possible areas to invest in, I have looked into opening an LLC where I plan to invest, open a business account and obtain credit that way but that takes time to build your business score, another option I can go with is use my credit cards to get a deal or ask family and friends to invest with me.

Now here comes the but, you had the opportunity to collect it and waved it (you gave up collection opportunity and gave them a get out of jail free card), albeit they likely would not pay you and would love you to wave it so they don’t have a mark against them.If you are in the midst of eviction I would continue with it.

At one time, I had no credit cards, car was bought cash as well as any other purchases (before I bought my house).

Ideally is you play your cards right you might be able to house hack while you're in college. 

I talked to the heirs after the mom passed and negotiated a deal to buy it for $40k, then spent $72k renovating (with credit cards and borrowed money), then sold for $224,900 three months later.

You could allow them to drop their payments in the night deposit along with the proper deposit slips provided you trust them not to make mistakes on the deposit slips for which account and who they are making the deposit, however; if you want true 24-hour convenience to a few tenants, get them an employee, deposit only, card for the ATM. 

It can be a kind thank you *wink* with a gift card in the mail.

the gurus sell the idea of wholesaling as easy and no money down but that couldn't be more wrong. there is no guarantee return on the money invested in marketing . a wholesaler needs to do a lot, a lot of research to the local market where they are trying to find deals. you need to not only find the deal but prove that it is one to a potential buyer/investor. now Im not trying to discourage you, there are plenty of ways of getting started without MUCH money down .you can get a few cards made at a copy/print shop. you can talk to people and let them know what your trying to do. you can build a social media platform which is free. remember as a wholesaler your simply trying to find the deal then sell it at a commission. a friend of mine that is an agent uses their title company  to find information on houses in my neighborhood,  become friends with agents!.

I know that spouse or even children are responsible for any credit card or auto loans/ revolving debt.

I took it several times and used the concepts that I had trouble with to create flash cards and reviewed those over and over.