Plumbers have equipment that is much more heavy-duty than what we own ourselves and are experts in rooting out plumbing lines and ensuring drains flow freely.Electrician - While we do quite a bit of electrical work ourselves, it is important to have an electrician available for more complex work, such as upgrading an electrical box or replacing wiring.Carpet Sales and Installation - Every property we have ever owned has received new carpet at some point during our ownership. 

It's cost me some carpet and a coat of paint which I did myself except for the carpet install.

Pay for the delivery/install. 

I can find anyone but for now will only have my team cut down trees, door installation, and window installation.

DIY projects?

If tenants pay go with the cheapest cost to install and replace.

For example, water heater install and there is no shut-off valve before the heater it cost $150 for a $20 part with 15 min of install.The challenge with doing a project (one that involves more than one trade-like kitchen or bathroom update) is there are usually holes in between what each contractor does and filling those holes is challenging.

To cover my very small 36 SQFT of counter space I'm looking at $200~ in material to install myself.Does anybody have any experience with this stuff?

Is there an actual reasonable fix to this or do I have to install the fancy heat sensing flaps that will close off air flow going to the bedrooms???

Thanks for the suggestion, but I posted in DIY because I thought it might help someone choose a paint color on their own by copycatting the pros.