Demolition or rehab?!?

[Mathieu Fortin]

Hi, new here and to REI, I tought I was gonna book my first deals in FL but turns out 1 landed on my lap this week and I just spotted another 1 today by taking a shortcut to avoid traffic. The one I spotted today appears to require quite alot of work from the outside, I've seen it before but it wasn't for sale and the brush and over grown trees hide the house pretty well. The location is ideal, close to highway, school, train... I have yet to contact the agent advertising it. I'm curious to see thow much cash to spend on repairing the house, what % of cash should one spend for repair on the purchas price. Don't know if this is making sense to some1. My english isn't that good :oops: They advertise the house @ 208k, building is worth 145k and land 63k. I would send an inspector, to get all the details and then make an offer if repairs aren't too much. So thats why I need to know how to calculate it. Is there a% of the price that you shouldnt go over when rehabbing? I put up 2 pics, the only they have, what can be done about the brick? Looks awful! Painting brick isn't too popular around these parts, can it be pressure cleaned?
Thanks,
Mathieu