Currently I run an online business, and part of the reason for the desire to get involved with a rental property is that I see rental properties as a smarter and more stable long term investment as compared to an online business that can dry up in a few years time.Currently I live in a very low income city on the east coast.

This way you don't get nickle and dimed by the contractor and bleed dry of your working capital before a single shovel has broken ground. 

I had a French Drain installed, basement became completely dry.

America.but must air seal as it will bring warm air from conditioned spaces to basement. dehumidifier produces heat as by product, and takes more electric to operate. if go with dehumidifiers get large comm heavy ones with humidistat and direct drain. no one will walk away with it. 300lbsdont just open window unless dry air cat 1 wind blowing straight in.it wont remove moisture only feed it. i use activtek  air scrubbers secured to a bracket holding plate. it kills protects 2000-10k sqft of mold bacteria, and reduces moisture as its byproduct of technology esp basements.

@Mark S.How long can this be sustained ( her being late every month ) youcant run business like this worried if you’ll get paid or not .

Hope for the best, but it will be a scramble trying to get the roof dried in or other repairs immediately after the storm.  

The exterior is a little dated and there is a huge unfinished (dry) basement.

Now you see a ton of these guru's pushing courses as their main way to make money because property deal flow at the bottom pricing they need has dried up.In the states investors can be tougher to deal with because they know value.

You may want to sleep there or use dry gas to attract them...CO2 is what they track.

Unfortunately her being my sister I also know that in august/beginning of september she went on 2 vacations out of state, the state fair, a concert and the county fair...so she is NOT struggling financially she is just putting rent as her LAST priority!