I would appreciate any advice on whether it's a good idea to invest in land on a slope and the potential challenges of building on such terrain.If this seems like a worthwhile investment, can anyone recommend reputable construction companies that specialize in cabin builds on slopes? 

Ok to summarize it seems that there is Zero way to dodge CA annual fee.

I've never been through this process and it's my biggest fear because it seems to be SO costly!

That seems a little suspect to me and sucks that you had to pay for that.

There is plenty of street parking so it wasn't a giant issue.The conversation was pretty straightforward.

I checked with my insiders and it seems to be way worse than you mentioned.

Seems like an awesome deal.

Illegal basement units seem to be very common in this area.

And it is very straightforward to file these, so I would expect it to be well within the scope of any operator sophisticated enough to pull off an owner financed deal. 

I am about an hour north up in Sheboygan Falls and I have seen many mid term rentals on the market and it doesn't seem like they are getting rented out.