Wholealing Vacant Land in Michigan

[Isa G.]

Greetings, 

I'm working on an off-market vacant land wholesale opportunity and have a couple of questions about how to properly determine the end price I should assign this for. It's a 1-acre residential lot in a rural town of Jackson County, MI. It is right off of a major road and has nearby new builds that recently sold for 260-280k. It has a septic tank and electric ready to go and the land seems ready to build on except that it's got an old trailer and barn that most likely need to torn down and removed. 

I'm waiting to hear back from the County Zoning Department to gather more info on potential uses and confirm that it is SFH ready but in the meantime, I'm wondering if anyone has advice on the following:

1) Should I be concerned about the existing trailer and barn (and possible need to remove those?) Could they increase costs significantly for a new build? 

2) How should I best comp this lot? Seems like using sites such as land.com, landflip.com, landwatch.com, and landcentury.com to find comps is one approach but what if there aren't any apples-to-apples comps? I've heard others say to take 20% of the price of nearby new builds and that is around what an end builder would likely pay. So for example 280k x .2 = 56k. Is this accurate? 

3) What are the best ways to find buyers for this kind of lot? I can use PropStream's cash buyers and filter for vacant lot buyers as one approach. Local agents may also be able to help. What other strategies should I try? 

4) I'm realizing there may be some untapped potential for more off-market deals like this and would love to learn from/partner with someone who has expertise in this niche. Let me know if this sounds interesting. 

Thanks,

Isa