Need help with diagnosis in CEL fault codes and next steps

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2009 Audi A4 Quattro 2.0L TFSI Had oil leak from rear main seal area and CEL lights on. Diag codes pointed me to replacing the PCV valve and I also replaced all 4 coils andspark plugs, air filter and cleaned mass air flow sensor. Also changed oil and oil filter. Since replacing PCV valve the oil leak appears to have stopped with a few days of the oil that had turbo blowby finally draining out. Diag codes had dropped from 22 to just 4 codes left. P1287 (too lean / vacuum leak) and P0300-0303 misfires on all 4 cylinders. The car was running fine but a but rough at idle. Attributed to too lean mixture. Reset systems with battery unhook and touching positive to ground and then after hooking back up did a throttle alignment. CEL was still on but car drove fine, no rough idle, perfectly normal driving. Would even say it was driving as well as day 1 with turbo power and smoothness. No noticeable misfires. Just the CEL with P2187 and the 300-303 misfires still lit up. Over past week the following codes have crept into the equation.  P2279 P2187 P0299 P12A2 P0300-0303 So now I've got codes regarding fuel press or sensor, air intake leak, vacuum leaks, and cylinder misfires. Now if I clear the CEL. The car runs rough at idle, in park, drive, whatever.. at idle it's rough and misfiring like it wants to stall. When the CEL comes back on after a short amount of time the car returns to driving normally. So I feel like the ECU must be compensating for something and normalizing the car properly. At this point I'm stuck on what to do next. Should I change the fuel pressure sensor? Smoke thevacuum hoses? Or just continue to drive it as is with CEL on for next year and a half until I get the amount owned left on the finance of the vehicle to get rid of it without getting killed financially. I have a mechanic friend who is helping me out with troubleshooting and I cannot afford to take this to a dealership for repair, but I feel like we are close to getting this squared away and just need to either fix a hose or replace a sensor and we will be home. Any thoughts or opinions would be greatly appreciated.