However, mine is for rent with upgrades as I go.

Is there an opportunity to upgrade the interiors in order to raise rents?

If your plan is to upgrade the triplex and get a better caliber of tenant in there, well, a registered sex offender might scare folks away if they hear about it. 

Tenant and SFH resale do not go hand in hand.Your best option is to set it up now for tenants as I suggest and then do another reno to upgrade for sale.....possibly stone, hardwood and tile to maximise profits when you sell assuming they are appropriate for your market.

I am only looking for something small  - less than $10k for minor plumbing issue and electric upgrade. 

But now I am able to bump up rents $100 to $200 with very minimal interior upgrades between turns.

If the apartments are contractor grade and your property is upgraded, then you can potentially charge more.

Hi Ryan, If the comps support 175K ARV by those upgrades you mentioned, then you can be optimistic because they're obviously selling for that price.

I want to do the upgrades with resale in mind.

If they are *good* comps (within 1/2 mile, sold in the last 6 months, same basic floor plan, same basic vintage, same basic upgrades, same side of the freeway or river, or mall etc) then 3 is fine.