You "could" find a used frame on EBay , that is one option as far as that goes , if it's cheap enough , you can either sell it and still do OK , or keep it and know your now riding a bike that won't fail on the next jump .....
As far as what is wrong with the engine .... If it ran before the valve adjustment , then it would suggest that it was something you did , by either reassembling wrong , or , forgetting to plug something in , or , pulling the coil power wire off when the tank was removed and it was not noticed , or , blew a fuse
It could also be possible that the fuel filter is clogged , or as you mentioned , that the pump may have just decided to quit working
..... in order to test the PGM-FI system , you will need to buy a Factory Service Manual , as the Owners Manual will not have the testing procedures , and you have the Injector Circuit , #1 or #2 CKP Sensor that could cause it not to start , along with any FI issues , like the pump itself ....... As far as connections go , check the MAP Sensor connection , the ECT Sensor connection , the TP Sensor connection , the IAT Sensor connection , the Injector connector , the #1/#2 CKP Sensor connector , the ECM connector , all located around the Throttle Body ..... Since you can't actually start it , you won't get any Error Code flashes from the Map button on the bar , so hopefully , you just inadvertently forgot to plug something back in , or unplugged something by pulling on the connection , and it looks like its connected , but a wire could be pulled back enough to not complete the connection ........
Basically , you need to decide if after checking everything , if you want to spend the money on a Service Manual ($50-$60) and try to troubleshoot the sensors , etc. , or cut ties with the bike and either sell it as a parts bike/basket case , or go to the effort to sell it on EBay , which would include disassembling everything , and packaging the parts up and waiting for each item to sell , then finding a scrap yard that will let you part out the frame for the Aluminum cost (you will need to provide them a Title) , and using the money from selling everything (eventually) for a new/used bike
Its a tough call either way , as it could be something simple and it's running again , BUT , you still will have the frame to deal with , but you will get more out of it quicker if the bike was running , but if you can wait it out , you can make a lot more by parting it out on EBay
Keep us informed on your findings , and your decision to keep/sell