Updating Current Property vs. Saving Capital

[Ryan DiCanio]

What factors impact the decision to invest in updates for a property, versus saving capital for other investments?

I am currently house hacking a duplex in the Aurora area. The side I am living in is very outdated (20 years at least). I have added a fresh layer of paint and have ripped out all the carpet in and old tile on the first level, replacing it with Lifeproof Vinyl Flooring. 

There are a couple of other duplexes in my neighborhood; on the exterior, one of them looks similar to mine and a couple of the other ones are more up to date. I have not had the opportunity to see what the interior looks like.

When making the decision to either invest into my current property versus saving money to invest into other properties, what factors should I be keeping in mind?

If anyone can provide some insights I would greatly appreciate it!