You will find it most useful to attend a couple of local real estate meetups, because that's where a lot of seasoned and new investors hang out :) Here's one that I host every month, usually for newer investors like yourself:https://www.biggerpockets.com/forums/521/topics/1163449-are-...

I am a Real Estate investor in Colorado looking at doing something similar, I put together a syndication here to work on a development, starting next year to build tiny home neighborhoods in the local area.

If you're just starting, I'd suggest you attend some local meetups and network with some local, established, successful investors.  

I am with Vlad on this: Call the local HA directly.

When it comes to buying windows for your house flip, you might want to consider checking out local home improvement stores or even online retailers for a wide selection.

The heat pump system was installed by a small local contractor. 

How many Adults (of local, legal, age...18, 20, 21) ? 

I would prefer to buy something local to the Longmont CO area, but there are limited options, so I am open to out of state investing, but concerned about managing it.

I don't remember when was the last time that I have to go on IRS and/or my local taxation website to file payments personally. 

Check local laws to see what you can do.