New user/Mercedes noob needing help with a huge resto job

[87190e2.6l]

First off I would like to say hello all.

I'm a Mercedes virgin and am in need of guidance.
I think I might have bit off a bit much for my first MB but I am an experienced mechanic with close to 20 years under my belt this far so I'm confidant I can do it lol.
So enough about me on to my project thus far.

I have all ways wanted a mob and finally purchased a cheapy (never good lol) these are the details; 1987 190e 2.6L with 217xxx miles on the clock.

The body and interior don't show the age as much as the engine does, I got the car for 900$ With a blown water pump and ruff "cold" idle is what the add said, "cold" turns out to be all ways.

I went ahead a purchased it and drove it straight to my friends house where I could repair the water pump.
I never let the temp gauge get above 3/4 on the 2.5 mile drive.

The drive was made at night so I wasn't able to see if it smoked or anything else.
The person following me reported only a slight smoking right before I would pull over to let it cool down.

It started every time on that drive.
I replaced the water pump and after the repair it wouldn't start, it turned out the coil was bad. Replaced said coil and now it starts good.

When diagnosing the no start I performed a compression check and found 5/6 cylinders were at 14 +/- 4 psi and #5 cylinder was at 0 . The compression test was performed after the vehicle say for about 4 days.

Once I got the coil replaced and I got her started I found that she makes severely and runs rougher than running on 5/6 cylinders would explain.
So I performed another compression test and found that the 5 cylinder were now down to 100 psi even at about the first mark on the temp gauge.

This is really freaking me out because I don't have a lot of cash to dump into this project I bought hoping for something for safe for my girl friend to drive the kids to school in.
So I have to watch every penny I spend really carefully and so I really don't want to have to pay a 150) tow bill because I don't have a way of towing it so my first question is more of an opinion poll.

My shop is 19 miles from where the car is at, at my shop I have everything I would need to repair anything on it besides machining.
So I want to drive the car to my shop but I don't want to screw it up anymore then it is, so is there anything I can do to make sure I don't or to make the drive even lol.

I have a bunch more questions but figure I'll ask them with new info considered.
Please let me know if u need anymore info, I am writing this on my phone so I can't guarantee I didn't leave anything out lol.

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