I have learned about the 50% rule (explained here https://www.biggerpockets.com/blogs/4454/32123-wha...) and was wondering if any seasoned investors saw a problem with using the saved funds in a highly liquid investment vehicle.for example: I save 50% of my rental income in a separate account to compensate for maintenance and vacancies, and use that money to purchase dividend bearing stock.

I would suggest looking at some of the free guides under the education tab above.I would learn ans much as you can from this gentleman but I do see a conflict of interest in that he is trying to sell you a property and yet one of the most important things to learn is how to evaluate a deal.

Good mix of investors, new and seasoned alike.  

I just called Listsource to ask about how often they update their data and I was told that for real estate it will not be older than 6 months.

If the homes are older and average shape I've heard:  take a full month's rent as "down payment", so if home rent is $500, take $1000 for the first month, and sign over the home title right then and there.  

It's older and more established so homes are a bit cheaper (around 120K or so) The block nearest to 10th street had an apartment building that had a lot of crime in it but I lived down the street a few blocks and never had a single issue.

Some older houses are really expensive, especially if they are in nice areas and have been kept up well.

I'm also a seasoned investor that lives in Delco and can really help you with all aspects of the deal not just turn in the AOS like other realtors.

If you are not a bookkeeping client and I have to unwind a bookkeeping mess during tax season, I can promise a few things.   1.  

@Amy LuAs folks pointed out on your other thread, 242 gallons per hour is just 4-gallons per minute - an older toilet uses that much per flush.