Repaired sinkhole property

[John Lee]

I just saw an interesting repaired sink hole property listed and I want to make an offer. 

What are your experience with repaired sinkhole property? What percentage does it affect on selling price?

Since I invest for cash flow, the lower property tax value and higher rent payment would be great. In case I need to exist I want to know how much longer do they stay on the market? and if the property get any appreciation.

Will bank loan for repaired sink hole property? What about insurance?

My best and highest offer would only be 70% of asking price. Should i go ahead and offer it anyway or wait and let it sit on the market for a couple month?