Build a shed yourself and use it as "on the job training." Those straw built sheds are rinky dink. The people who throw them together are even more sketchy than the finished product. You will be tearing it apart and hauling it out within a few years. Or end up having to reinforce the building with more braces and another layer of flooring. Thats my 99 cents. Its not hard to build a shed especially one of that size. Cowboy up and give it a shot.
Cerritos College Woodworking, one of the finest woodworking schools in Southern California, offers classes in furniture making, cabinetmaking, CNC woodworking, and related topics. Cerritos is the school for you, whether your goal is to acquire new knowledge, gain confidence in or improve your skills, enter the field of professional woodworking, or develop a rewarding hobby.
I don't like to be ignored either. I came the same day Mahndo left after waiting 30-45 mins. I left a note with name and number but no one even called me back. I was completely ignored. I found a class over at The Corona Heritage Park in Corona instead. Their instructor answers when I call or text. Nice to be acknowledged! Going to finish beginning and take advantage of the key access in their intermediate class.
So drill the benchdog holes through the MDF layer. Begin by laying out their positions. You'll want these to be precise, so that the distances between the holes are consistent. The vises you are using will constrain your benchdog spacing. My front vise worked most naturally with two rows of holes four inches apart, my end vise with two pairs of rows, with four inches between the rows and eight inches between the pairs. Because of this, I decided on a 4" by 4" pattern.
Not sure about Midwest but I have a 24 x 14 Game rm attached to my shop and I put a small window unit/heat pump in the wall. It stays comfortable all year round. It get really hot here and we had a several day in the 20's this winter but it's insulated well. That might not be as cold or as hot as in some places but the unit I haze does not run that often and has a low cost rating. I'm planning on putting a larger unit in the shop area even though I do like to work with the garage door open. The door is insulated so I can run A/c in there. Just my .02.
I made a template by scribing two adjoining squares on a piece of MDF, using compass and straightedge, then marking each corner with a centerpunch, then drilling the points with a 1/16" bit. I find I'm always breaking small bits, so I picked up a couple of each size some months ago, and on looking I found I had three 1/16" bits, which worked fine for what I intended.
Out of all the shed books I have read, this book stays by my side while I hammer in the yard. The book is well written by what appears to be a non professional book writer (A Good Thing). It reads as if you are getting advise in laymans terms from your neighbor "The Craftsman", a welcome change from the DIY books, that assume a level of expertese. The level of detail is high and discusses gotcha's, advise, and trade "secrets" that could have only come from years of personal experience building sheds.