When I first started, I had no goals. Back in 2009, I sort of approached real estate investing from an angle of "I doubt the real estate market will ever go into the crapper this deep again, so throwing some cash in it at its lowest point made sense." I have always tried to invest according to the principle:
"When everyone is greedy, be cautions; when everyone is cautious, be greedy!"
I follow the same principle when investing in the stock market as well. I am in the Detroit Metro area. At that time, things were very rough here. The loss in property values was tremendous and the market was over-saturated with cheap houses, REOs and desperate sellers. Seemed like the perfect time to throw some money at it as all calculations I made, pointed to the fact that short of some catastrophic chain of events like Detroit Metro becoming a ghost town, it was going to be hard to lose money. Not knowing squat about real estate investing, I bought my first SFR within walking distance of my home and figured I'd give landlording a try.
The rest is history - I kind of got hooked and have been searching for deals ever since. As for my goals... well I have a great a career which provides a nice lifestyle so I am having a hard time imagining walking away from that at this point in my life. However, if I was to articulate my objective related to my real estate investing, it would go something along the lines of "generate enough income to have the option to quit one day (if so I chose) and not have to change my lifestyle". I am not there yet nor am I actively pursuing this at the moment so I haven't even calculated what that means in terms of actual dollars.
My point is... having goals is great! I admire the fact that you are thinking about that, but sometimes great things happen by just taking a chance at something new.
Good luck to you!