Engine Knocking Noise problems of the 2000 Volkswagen Beetle

I bought a Beetle (136k m) from an acquaintance for $1600 cash there were some issues I. E. The faulty trunk release didnt work, the driver side door had no power, (turns out the door motor is a common issue Beetle has) sunroof was stuck part open, and the key fob to the Beetle had been worn/broken. (fun fact: without the key fob, access to the trunk, and no power to the driver side door. The stock alarm is very difficult to disable. ) we drove the Beetle for about a week when the clutch went out. A transmission specialist quoted us $400 for the hydraulic line, after further examination the entire clutch was out (he charged me $1100) the very next day the oil light was blinking, we checked the oil level and it was full. We continued on our business the car started losing power, stalling and making a horrible tapping/knocking sound. The engine light started blinking. We werent able to pull codes because the odb was disconnected during the expensive clutch repair. At this point we have invested a great deal of money into this used vehicle, we are hesitant to to take it to the crusher. We bought a haynes repair manual and after some luck, common sense, and trouble shooting we were able to diagnose the car with a faulty camshaft timing chain tension guide. The repair seemed easy enough so we enlisted a our family mechanic to perform the repair. After another $575 we discovered that the tension guide was in fact the problem. We were able to get the vehicle all put back together with several new vital parts. It will not turn over. The manual indicates it may still be out of time or we may have a blown fuse. After I replace the fuses and reattempt installing the timing chain, I will have put 3 x as much money into this car than its worth. I feel like volkwagen is producing lemons and ripping off americans!!!.