Refinish hardwood or install LVP?

[Anna W.]

I'm renovating a unit in my 5-plex (first multi-family rental property for me). We removed old disgusting carpet, and found fir (?) floors underneath. They have clearly been sanded many times and are kind of thin, but would probably hold up for another sanding (per flooring contractors who have taken a look). There's some water damage in one bedroom that may require patching on a small area. 

My question: 

Is it worth spending the $ to refinish, or should I just install LVP on top of the wood? Wood floors would definitely be a nice selling point in this market, and would go with the historic nature of the house, but I also liked the look of the LVP I installed in another unit, and I like the durability of LVP. I've been given quotes for refinishing the hardwood at around $2,800, and purchasing LVP would be around $2500, with installation costs being the unknown factor. 

Thanks in advance!