Just noticed
your other thread about your garage. Why are you asking in this thread where the placement of the panel should be? The electrician you originally spoke to and who agreed to do this should have instructed you in detail as to where to place the panel etc. I don't mind giving advise on this at all believe me, but my concern is that the electrician doing your job may have his/her own line of thought as to how they want it laid out and why. I was never there, they were, you would be surprised as to how quickly I could change my mind in how it should be done if I were there and happened to see something else you have yet to bring up or I happen to notice with my eyes. Also you ask about lighting and number of circuits. This should have all been laid out by the electrician who agreed to do the final hook ups. If I were hooking up a panel as an electrician I would want to know what circuits are going where before hooking them up.
Were you instructed as to what panel to purchase (pending how many circuits you will need to have according to your load calculation) or did you just buy one on your own without their guidance? Although a garage the way you describe it won't have that many power hungry devices but if you are putting in a 100amp panel you must be preparing in advance (which is good) for expansion; meaning maybe down the line you want a compressor, vehicle charger station, other power hungry tools. When you don't have the power available in the garage you tend to limit what you want to have or do in it; once you have the power there you tend to add more power hungry devices since you have the room.
Sorry just a bit confused as to why you are asking us when he/she should have told you this and made it quite clear to you where that panel should be and how it should be mounted. Again, we don't mind helping and that is what we are here for I just don't want you to find yourself putting out a lot of extra money because you went with our course of action instead of the electricians and then he/she says they have to change what we advised you to do even if our advice is still code. I am sure in your conversations with the electrician it would have been brought up where the power was coming up from the floor etc and then he/she should have told you the placement of the panel.
In your other thread you said you would be running 100amps out to the garage. May I please ask what size, type and number of conductors you ran to the garage and how? I certainly hope this was dictated by the electrical company that agreed to do this final "hook up". The company that agreed to do this final hook up, did you check to see if they are licensed? It seems to me that they may have given you a bit too much lead-way in making the decisions. I hope this does not cost you far more than you anticipated. Again, just trying to protect your investment. Please don't take it the wrong way. I am more than willing to help where ever I can.
Didn't mean to go off on a few tangents; again only to help you did I say these things. In no way am I trying to "tear apart" your plans or criticize your choices here; not my intention.