Personal opinion, but low quality homes are a job, not an investment.
Low end housing will likely not appreciate in value in any significant way. What you have is 200/month in cashflow, and you will likely have 200/month next year, and the year after that, and the year after that. The problem is that 200/month isn't going to change anyones lives. For the amount of time and effort that it takes to learn about real estate and how to be a landlord there are much easier and safer ways to earn 200 bucks. Go drive for Uber 1 weekend/month with no risk whatsoever. In order for low income housing to work, you have to rapidly scale to dozens, or hundreds of units. However these units are time intensive to manage, and thus quickly turns into a job.
While this job may not require 40/hrs a week like your old job did, it is in fact still a job. And probably a significantly more stressful job than your last one since this one has a financial risk to it. Often times property management companies aren't thrilled with dealing with these properties, and will either charge a significant amount to make it worth their time, or simply won't work with you to begin with.
That's not to say that C/D properties are bad, some people love them and make good money from them. But realize that it is, and will always be work to keep them producing income properly. Personally I prefer B+ neighborhoods. While the initial cashflow is lower, they are relatively stress free properties that have predictable annual rent increases. Due to these rent increases, my properties quickly cashflow much more than a meager 200/month all while experiencing dramatic increases in value.
Lets assume a hypothetical scenario where you purchase two similar homes. Both homes rent for 1k/month. The difference is that the first home is in a cheaper neighborhood, and it's total monthly expenses (mortgage, insurance, repairs, vacancy etc) is 800/month and thus cashflows 200/month. The second home is slightly more expensive, and due to it's higher mortgage payments, its monthly expenses are at 1k/month and is therefor cashflow neutral. However the first home is in a stagnant area, that does not have any annual increase in its rents, while the second home increases by an average of a modest 3% per year.
If you assume this 200/month with little or no increase in appreciation or rent prices, then in a 15 year span the first home will theoretically cashflow 36,000 total, at a rate of 2,400 per year, or 200/month.
However the second home in a better neighborhood,may start off cashflow neutral, but after 1 year of rent increases will be 1,030/month and will cashflow 30 bucks. Over the 15 year period this home actually cashflows more, at 43,185 total cashflow, and is cashflow positive by 512/month by year 15. If you expand this thought experiment past the 15 year mark, this home starts to obliterate the other home in terms of returns
However the real magic lies in the fact that the home in the second scenario has also appreciated by roughly 51%, and also likely required less money to be spent on repairs, and caused significantly less stress in management.
The age old mantra in real estate is location, location, location. If you have the right location, the cashflow will come...it just takes a little time. People complain that areas such as San Francisco don't cashflow, however according to RentJungle.com, the average rent for a 2 bed in 2011 was 2611/month, while the same apt would rent for 4,690 today. That's a 2,080/month increase in the last 8 years and would be cashflowing VERY nicely.
As I been saying it isn't everyone's cup of tea and you can cashflow more than 200 especially if you buy right not to mention appreciation can also be gained by doing nice upgrades ( not extravigent)
I have done a real life deal that cash flows more than 200 per month and my all is price was less than 50 and it appraised for more than the purchase price and rehab costs. Also the same tenant has been there going on 2 years in a few months and the other tenant is going on a year and is going to renew her lease in 3 months and neither one of them damage the property and no major mechinal issues. ( It is a multi family unit) Now with that being said it was not easy by any means to get to this point but can be done.