But the transformation in those areas have taken decades.

I know what it is.I have seen this before.I can not be fore sure without seeing it for myselfQuestion when you go out side, and follow your wire you are going to come to a pole, on the pole there is a electrical transformer. ( as you get the pole the sound should become louder) the reason you can here it in you house is one of two reasons. one the noise is coming from the transformer that is too close to the house , or the transformer is about to go out. sometimes when the lighting hit them, they make this sound before they shut down.

The types of repairs I have done are putting a piece of trim back on the wall, replace a transformer on some string lights, etc.

The idea being I would refinance the loan into a renovation loan, with the end goal to transform into 4 condos.

Because if it works for this how's, this opens up a whole neighborhood to transform essentially. 

Implementing 1 small and very achievable habit every quarter- Jesse mentions that the power of doing this for quarter after quarter, year after year, decade after decade, will transform you from the person that you were, to a brand new person that you will become.3.)

Purchase price: $35,000 Cash invested: $30,000 A one-hundred year old adobe home was transformed into a one-of-a-kind, 5-star, short term rental and recently appraised for $130,000 with a monthly income of $1,600.

One of the funnest projects I have worked on as far as transformation. 

In our properties in the C-/D+ 'hood,  we ripped up old carpet and redid the original hardwood, painted the walls, refinished the cabinets with rustoleum cabinet transformations, installed backsplashes with "sale priced" glass tile.

No fear going into an area and helping to transform it for the better, and make some good money while doing so.