It seems the safest bet would be to build the fuselage frame out of welded steel tubing.I have no experience with the Texas Parasol, other than looking at the plans.
Epoxy cannot be substituted for structural rivets or used as structural bonding between aluminum parts anywhere in the airplane. Aluminum develops an oxide layer immediately after being exposed to oxygen. The oxide does not adhere well to the parent aluminum, so while the epoxy adheres to the oxide, the joint will fail between the oxide and parent aluminum. People have died doing this. There is no practical way for an amateur to prepare the aluminum for bonding, though it is done commercially.
You must be able to obtain the materials in the specification listed in the plans. Tools will be needed. You can squeeze the solid rivets rather than driving them; it will take more time. Machine screws of the proper diameter can be used to temporarily position parts rather than use Clecos. Study aircraft repair procedures in FAA AC43.13 or other sources. Again, if you can't obtain the specified materials, you can't build the airplane.
The hardest aspect seems to be fabricating the wing framework.
Is steel construction applicable to the wing frame