@heewon Visitor visa applications are individual, but you can create a group so that all applications in that group would be assessed by the same officer.
So bale create ka ng individual applications at may question dun something like "Is this application being lodged as part of a group of applications?" tick Yes and create the name of your group.
Sa application ni wife mo tick Yes also sa question and indicate the name of the group.
As to proof financial capacity, include all:
a.) Bank certificates and latest 3 months bank statements for each account
b.) Latest 3 months of credit card statements
c.) Land titles and other real properties.
For proof of travels, if you have an old passport, you can use that or you can make a letter stating this is your first time to travel outside the Philippines.