I don't want to use my personal cell phone number in my marketing and I also need to track and save calls I may miss when I'm not available to take calls.

Haven't focused too much about learning tax advantages to real estate, but I know when done right it can save you a lot, so I'll be sure to check out these resources

The average person across the country has literally nothing in savings... and if they do they for sure don't have an extra 40k to plunk down on a house.

Listen to the seller and clue in on the reason they are selling.if she won't call back or answer your calls, send a nice letter apologizing (if you think you have some to apologize for) or just something saying "thank you for your time, i would still like to talk to about the sale of your home"....maybe a thank you card for her time and consideration......a gift card or offer to sit and buy her a cup of coffee...... again trying to resolve any issues that may lead to you closing this deal....you worked hard for this lead (i presume) dont just give up!....

Can that be used to reach out to sellers to save them from foreclosure?

Some people have given him a lifetime of savings with nothing in return.

Savings, equity line, personal loan?

@Omar @Omar Khan So let's assume that 30k is not my entire capital pool but my risk capital distinct from my portfolio/Net Worth/Savings.

You may also consider working a "regular" job while learning and saving.  

Depending on how much you buy it down, a lower rate can also save you thousands or even tens of thousands of dollars over the life of a 30 year mortgage.