Planning to make my own cabinets for the front my trailer and looking for tips & tricks from others that have done the same.

Current plan for my V-Nose Trailer:
-sheet metal skinned plywood for the doors & siding
-angle aluminum for the trim
-I'm not sure on the counter top yet but I'm thinking stained wood or stainless skinned wood so I can replace it easily if it gets beat up over time
-Traditional trailer door latches ( I need to find where to buy these still)

And I haven't decided if I am going to permanently fix my tool box in the trailer or leave it on wheels and strap it to the wall. (US general 34" tool box)

Just a suggestion, put in bracing so you can mount a vise. Many times I have wished I had one. Good luck!