$200/mo doesn't give you a lot of margin for those little things, much less allow you to save up a nest egg for capex (which should really be its own line item).  

There are some people who have worked hard and gotten that nest egg to invest.

Way too much risk to put on yourself at that age, I would 100% wait a couple years and save up a good nest egg before going into investing.

Flipping.Flip your cash through a property, take only the profits ou...and reinvest the seed money into the nest one. 

Benefits of SFR is provided you do get good tenant search and find the right tenant, SFR tenants love to nest and stay for a really long time, especially if you are a good landlord. 

My original goal was to have this as a nest egg into retirement.

I would try to NOT use your entire savings though, definitely try to keep a small nest egg just incase any problems come up.

If you're wife feels ok with whatever and happy to invest your whole $110k nest egg, I'd rent and then look to BRRRR houses using your cash as the purchasing tool which will allow you to buy houses a little cheaper and faster.

If you are just planting long term nest eggs not a bad idea to leave it be.

I'm not sure even the Nest Yale Lock is that expensive!