If you made money on your first deal, that's a bonus... but the most important aspect is acquired knowledge.

This would allow you to save money that you could potentially invest in things like real estate, notes and private companies, however you have the peace of mind that if you need the money, it can be easily accessed.  

Therefore I suggest bookmarking a fe links to access resources like checking out these calculators , the file place, REI resources, and looking into getting some or all of the really awesome and necessary books offered here on Bigger Pockets.

There are a lot of comments about using OPM (usually when someone who doesn't have access to their own money), and that by using OPM there is less risk to you.

Hey @Wesley Mitchell ,Sounds like you're indirectly pursuing the  BRRRR method; acquire a property, improve it, then refinance and get your money back (in this case it'd be 75% of the ARV after improvements) This would help you keep the house as well as attaining funds for your next investment.https://www.biggerpockets.com/renewsblog/category/...

Interestingly, there have been several BPO's done, with walk through and everything, and the highest, and most recent value came in at ~580K.The failed Short Sale was actually approved by the servicer for $480K.I suspect this has to do with the Non-Performing status of the mortgage, my mother's age, and Massachusetts being a tenant/occupant friendly state.I had to terminate the arrangement of this Short Sale when I finally acquired unbiased legal/realty counsel, and realized that the sizable return (700K - 475K = 225K) would not only be an act of fraud for us to receive, but that the buyer was likely misleading us into thinking we would get this money.Since then, I really started doing my research, and am very interested in pursuing Real Estate Investing thanks to all of the hard lessons I've learned.I organized an off market pool of cash investors, and showed the house and took offers. 

Marvin There are so many things to consider, the way I will go about it will be by acquiring a debt weapon, home equity line of credit maybe for 20,000 and use that to pay down your principal there are some good youtube videos that will explain how to pay down your mortgage faster and save thousands of dollars in interest, but you need to have at least $500 of cash flow each month for that to work or use that to pay of a car payment faster anything that will increase your debt to income ratio so you can start saving more money each month cut down your monthly bills pay off all credit cards anyway you can i will try to get out of any car payments sell the cars buy a use one before selling the house, rent a room is a big house. obviously like i said lots of things to think about do you have kids so maybe a roommate wont work and your finances with out looking at them is hard to plan but I will try to make that house the investment get created if you have good credit that’s exactly how i started i hustle pay down my principal using the HELOC technique and when my equity become more because of lowering the principal I call my lender and increase my HELOC amount to the point that i was able to buy a house cash using the HELOC my HELOC became my checking account and i was paycheck parking all my income in the heloc is hard to explain what i did in a text but i hope this help you in getting created and into looking at more information before you sell or selling is the best way to go about it.

A vacant multifamily is hard to finance, you may have to access hard money or raise capital from investors.  

Just received an email from them notifying me that they are going to shut of the service in 10 days and they might need me to "provide the access to the property, if my tenants wouldn't cooperate."

I have access to on and off market properties.