I heard recently that aluminum can affect you later on in lifeCooking with aluminum cookware is especially bad for a person's health.
The very first thing you need is the knowledge of the condition of the foundationWill it support a second floorThat comes before you do anything elseAfter than you need a detailed design, a permit and the money to pay for the workLastly you need to decide what kind of contract you wantLump sum, cost plus or maybe cost plus a fixed fee for the contractors profit.
Answer is too complex to answer here, but some adviceIf you don't know this stuff, you are about to get screwedYou need to spend some money to save some moneyFind someone to hire as a consultant, perhaps a relative who was in the building tradeA retired contractor would also workHouse inspector my have the knowledgeGood luck too you.
Approved plans, building permitBeyond that, how can we guess without knowing the details of the house to be 'capped'.
Prices are IMPOSSIBLEA materials list is not possible without COMPLETE plansDon't even bother with permits until you have a structural engineer determine if the existing structure can support an additional floor without starting from scratchThe one thing I can guarantee is that the project will require the same permits as would be required for an entirely new house.
There was a study that was associated with alzheimers change and aluminumAfter that attempts to remove aluminum with chelation therapy in Alzheimers disease were doneThere were no difference in the course of the diseaseIt would take a toxic level of aluminum to cause neurologic problems and pots and pans and foil will not cause thisThe aluminum pots are probably better than the teflon coated pots and frying pansMedium heat is recommended with these cooking utensils as toxins(teflon) are released with higher than medium heat.