"I think it will fall under Joint Venture?"
I BELIEVE it has to be between two businesses to be JV, and it would be 3 needed instead of 1 registration, permits, book keeping...
"We want to start small and will be using a vacant room storage in front of our house, will that be allowed?"
Oh you will have things more than your computers.
If your foreign partner agree, then you can make a 50-50* partnership or company.
*Asuming at least 60 percent will be sold outside the Philippines, then it will be counted as "export business". If less than 60 percent exported, then foreigners can own max 40 percent.
"I still have no idea if we still need SEC or not"
Sorry I don't remember what Partnerships need
(because personaly I don't like partnerships
because then the partner can mess up my share too.)