If receiving passive income, have you considered other vehicles to get you to your goal without having to take on (or even learn the skill of) managing a rental property? 

I can put the foreman and 2 guys and their vehicles in a house that has a double wide driveway and parking on the street. 

No pets; Assistance Animal Policy; Outside storage; Window AC's; Vehicles and parking; etc.I wish I could tell you this solves all of my tenant problems, but it does not.

This increase in value will allow you to refinance out of the hard money loan (or whatever vehicle you initially used to purchase the property) along with the money you invested into the rehab.  

However, if I am able to come up with $2500 through part time work or whatever , would I be able to find an extra $30 from the vehicles above, or from that part time work, to ensure I don't lose my house?

Whatever you do I recommend you do not put towards the entire $30k into one investment vehicle.

Business Auto:  If you own, lease, rent, or have others use their vehicles on behalf of the business you should consider the coverage. 

Yield, in any investment vehicle is a function of risk or perceived risk. 

Investing is fun for me I get more satisfaction out of investing than buying an overpriced luxury vehicle that drops in value every year.

.$10 K you need 25-30 K monthly income depending on if you have vehicles, credit cards, student loans...Jumbo you need EXCELLENT FICO score.