I and I have personally used all three as my company enjoy's their best rates based on experience and standing. 

I really enjoy what I do.

You'll find out what parts you enjoy doing and what you do not.

But that being said I don't want to live at home with my parents, I need my privacy so my questions is if is dumb to rent in the city and enjoy my 20s while my mortgage gets paid for and yes I already have the tenants.

I typically start showing apartments in March (mainly since I don't enjoy trouping through apartments in Jan/Feb) and have most vacancies filled within a couple of months. 

If we decide to wait it out, it's a risk the upgraded tenant-base we are seeking may not particularly enjoy the original windows.If we pull the trigger, its very difficult to determine what the ROI would be or how long it would take to regain.I am leaning towards the "staggering" strategy and install new in the vacant units and plan to install them in the remainder as the units turn over.  

At first blush, the dollar seems to enjoy a lot of momentum.

Hi, I enjoyed Herb Cohen CD from Amazon, several books & audiobooks.Best

Enjoy your weekend!

I really cant tell if that is membrane or asphalteither way I never really cared for flat roofsbest fix is to have it hot mopped with new membraneshould last upwards of 25-30 yearsor you could go with a metal roof, pretty easy to install and are good for life if installed correctly, flashing ect...enjoy