Some need rent ratio of .9% and others up to 1.2% Interest rates fluctuate quite a bit.

Do a little research on using CC's for your business and paying 0% interest - there are quite a few people who teach about this.

The ones I’ve come across are in areas with boarded-up houses throughout the blocks, which I’m not quite ready to invest in as a new investor.

That would be quite a bit less than a service call and the tech will tell you if its working or not. 

As rent is officially late today can I just serve a pay or quit notice asap?

I have spoken to my neighbours but they do not know who the HOA board members are ( it is a large complex with 100 + townhouses).It is very strange but it has not proved to be a problem in the past as the management company deal with the properties externally ( eg painting ) and the common parts and have always done so competently and individual oners deal with the inside of the properties.They are now proceeding with the painting without doing anything about the termites.

That is quite the added cost!

I was merely browsing Amazon and saw quite a few that grabbed my attention.

I have used several methods that have been quite fruitful over many years. 

I’ve noticed quite a few price drops in SFH in these areas in the past few weeks due to shifting market conditions.