^^ What kcobabe said. That pretty much sums it up.
You say you have 30 days to pass emissions. I assume you need to renew your stickers? Now would not be the time to do a JDM swap of any kind. Dropping a VVL into a OBD2 car, where emissions testing is important, is not a drop in affair. Things will need to be modified and if you do a rush job/swap just to pass emissions, you will end up in a position that you do not want to be in. You will probably be worse off then you are now. If you want to do a JDM swap, do it down the road after you have done some research and gathered some parts. Take your time with it as it is cheaper to do it right the first time then it will be to do it wrong the first time and then spend the next year chasing the dragon. Trust me on this one!!
Like Kcobabe said, a mechanic will charge you lots of money for electrical work.
You need to be proactive with YOUR car!!! You need to go back to the mechanic and get a proper quote/estimate. You need to get a list of what things he believes need to be addressed. If he is not willing to do this for you then he is either a bad mechanic, a bad business man or has too big of an ego to make up a list for you. At this point you need to find another mechanic. If you do get the itemized list/quote of what he thinks needs to be addressed, take the car to another mechanic and get a second opinion. Do not show the new mechanic the quote, just get him to do up a quote and then you can compare. Also, once you know where you stand you can possibly address some of the issues yourself, with the help of the community here and google! It has been done before, many many times.
Whatever you do, do not be a passenger! Whatever you do, be a driver! If at the end of the day you have chosen to not be proactive, you may be left in a bad spot. This spot may be worse than the spot you currently find yourself in.
Good luck!