Regarding the motor. There is a possibility of saving some $$ on a new motor. If the extras that hang off the motor are good, then you can buy a long block. Also before buying a motor make sure the transmission is good. Rebuild the tranny before buying a new one (very expensive). If buying a new inboard at least get one that is fresh water cooled. If your old PCM is FWC save the tanks and have them boiled out. New ones are at least $500. Any thing that is good on the motor that you do not use or want put on ebay.
Have fun