If not there are resources to get a good estimate. 

Since this is our first investment property and we're out of state, we'd like some advice on general estimates or contractors who can come out and check out the place if possible!

Buyer, at Buyer’s sole discretion, may accept theplan of242 remediation, terminate this Contract, or allow the Seller to escrow one and one half (1 ½)243 times the amount of the bid or written estimate, as determined by the Buyer, of such244 environmental repair(s)at Closing.

The numbers:Property value: $421,000Mortgage: $241,000Potential cash from sale: $154k (after fees)Potential gross rent: $2,100-$2,300 (used $2,200 for calcs)Potential net rent: $277/m (excluding equity gain on mtg)Estimated monthly costsPI: $1027Property Taxes: $233Home/Flood Ins: $112PM (10%): $220Vacancy (5%): $110Maintenance (10%): $220

She had a couple of estimates, then had one from my contractor who was unbiased, not doing work, just an estimate because hers were from $10k to level it and try to sell the lot, good luck! 

I am going to walk through the property on Wednesday to verify my rehab estimate then get to work.

I am wondering a couple of things…1) What are my estimated closing costs of a 450k purchase price of home?

Generally if the seller lives in the property you would lie and tell him/her you need to bring your "contractors" or "partners" (potential buyers) by for estimates. 

-I've had a phone meeting with my current property manager who has advised me on local trends and things to steer clear of and will also provide rental comps to compliment the BP estimator.  

Many people are referring to a portfolio loan or asset loan and I am unsure how one secures the refinance loan after going under contract and before the rehab is complete.4) I am having a difficult time estimating rehab costs.