11k gp renovation; 10gp/day upkeep/operating costs, or maybe less.
I'll tell you what's reasonable: referencing 2e's The Castle Guide. In previous years I've done comparisons between the 5e DMG's "big ticket" items--keep/small castle, large castle, and tower--and the costs of constructing such buildings as described in The Castle Guide. The amount to which figures match is, frankly, astounding.* All this is to say: numbers derived from The Castle Guide are reasonable to use in 5e.
Looking specifically at your manor, then, we have two touchstones: the 5e DMG tells us a manor costs 25k gp from scratch (p.128). There's no guidance on how using materials recovered at the site might factor in, so let's take a cue from The Castle Guide and cut material costs in half by reclamation, and call it 12.5k gp. (As Miniman suggests.)
The Castle Guide tells us that building in a moderate climate, in rolling hills, in an agricultural society, with workers of average skill and morale, with resources near and good (there's a quarry in town, after all), and using recovered materials on-site all combines for a production multiplier of 0.5 (pp.48-53). The manor you're trying to rebuild measures between 130' and 100' in one direction, 80' in another. That'll require two "great hall" modules smooshed together, for a sticker price of 20k gp (p.54-55). Apply production multiplier and overhead costs (p.59) for a final cost of 11k gp.
5e DMG tells us the "maintenance cost" of a noble estate is 10gp/day--this includes the salaries of your 3 skilled hirelings and 15 unskilled ones (p.127).
But this is for the whole "estate," and it's not clear whether you're looking to gentleman-farm this place or just have a fancy house ripe for burgling. You can bargain this one down, perhaps.
* - Construction costs match absurdly well, that is. Construction times, on the other hand, are quite off. But the 5e DMG also assumes that PCs assist in construction, which is separately called-out in The Castle Guide under "heroic characters." I've not yet looked at how well times match or don't once that correction's applied.