My take-home pay puts me in the top 10% of all agents in my area and it's consistent every year.

If you need some pointers on how to get started feel free to shoot me a message and I can direct you to some of the resources I've found useful along the way

I’ve renovated the house from top to bottom, removing walls relocating bathrooms etc. and last year I sold off the extra lot which was now on a new road and 1031 exchanged it for a fixer-upper in Nashville Tennessee, repaired it and that is now rented out.  

Those 2 things will absolutely be at the top of my priority list if Im able to rent to college students.

The rental book investing would be a good resource if you'll be into buy and hold investing. 

I would much rather have them put a bonus structure in place where I would pay them less in property management fees (say 7% to 8%) and then give a bonus on top of that if they collect my rents on time.

This requires me to pay off mortgage worth 105K+124K = 229K.If I sell ETFs worth 229K and pay off these 2 properties, I expect to add extra cash flow of $1143 per month (on top of net cash mentioned for each property above).My question is, does it make sense to go this route?

Mine's top notch.

I'd suggest researching who the top local employers are.

Here are a couple other threads related to educational resources you may find helpful:https://www.biggerpockets.com/forums/70/topics/411...https://www.biggerpockets.com/forums/70/topics/432...