Is this deal isolated or cascades with other investments and guarantees?

I have been in residential construction for some time and know very few reputable companies that would guarantee a 60 day build on anything close to 4500 sq ft.

Just because you replace the old working unit with a new unit doesn't guarantee that you won't have break downs in the middle of hot/cold weather.

I guarantee the fire marshal would back you up.You could be nice and offer to install a $200 bike rack outside the building, but I would not compromise on storing personal items in common space. 

If you give up today, you are guaranteed to never find a good deal.

While the rent is guaranteed, I learned that the maintenance issues far outweighed any rent guarantees.Section 8 conducts yearly inspections which is great. 

But, could I minimize risk of renter defaulting on payments for the 2nd property by turning this property into a section 8 housing unit with guaranteed income from the gov't?

While screening tenants properly is not a guarantee to avoid this, it certainly is the best way to do it.

But, could I minimize risk of renter defaulting on payments for the 2nd property by turning this property into a section 8 housing unit with guaranteed income from the gov't?

If not, they are plenty of free ones out there that can.As far as tools recommendations, I agree with Jonathan, HubSpot is a great free CRM that allows you to make custom tags/lists and can have contact forms embedded in webpages, popups, sidebars, or stand alone form links to easily share in email newsletters/online forums.