Well, I guess since you have made an agreement to pay for part of it, it would be in your best interest to begin getting some quotes. You just dont know, maybe it wont be so bad. You dont want him hiring a 'good ol boy' to fix it though, and get in a situation where they create and set the price and laugh all the way to the bank.
Also, if you get estimates, you will be reasonably informed of what a fair or unfair price is. You'll also know whether or not whatever fix he comes up with will even cure the problem. You dont want to incur some huge bill from him and be stuck paying for something that doesnt even fix the problem. OMG that would be so bad.
When getting estimates its not important to lay all of this on the contractor either. Just explain the actual elec problem, tell them you are the tenant and that your landlord will be calling to set appt if he is comfortable with the bid. They dont need to know all of the personal issues.
Like I mentioned, hopefully this may not be quite as big a problem as you expect it to be. If neither of you are electricians, (my husband is) or your neighbor, then after a few bids you will become more knowledgeable about the entire situation and with this economy once you find out the exact issue, you can hire a contractor fully versed youself on whats what. Lots of out of work and perfectly capable electricians these days. Someone may be happy to give you a fair price and do quality work.
Oh yes, dont forget to ask around for reccomendations from friends, family, and co workers for electricians!!! Almost everyone has one in the family.
ONE MORE THING! You are in a dangerous situation as it is but worse because you dont have a lease. Before you commit to any payment plan, or half payment or whatever, make sure you draw payment plan up on paper and have him sign it. Get a receipt for each payment you make or pay with a money order or check. Keep a copy of the check/money order for yourself.
I still think this agreement is illegal and unfair. I would still call that number for free legal advice and get an appt. You may be able to get him to pay for all of it, as he should its his property and it is unsafe. He's not going to be able to rent that property as it is to anyone else if you move out!! So he looses bigtime if you move IMO. Get a legal apt. Get your repair quotes, draft a doc for repayment.
Im not a lawyer, but Im pretty sure that if you withold rent according to your states laws, he cant evict you or raise your rent by a rediculous amount. In Fl thats called a Retalitory Eviction/rent increase and is very illegal.
I wish you a speedy fix to this. I sure hope you get it resolved soon and safely.