Ramadhaan & Fasting

Niyyat for missed fasts

Q: I have to make up for a lot of fasts I missed, as well as for some that were most likely invalid (due to issues with ghusl). Is the following intention permissible - "I intend to fast today to make up for a fast that I missed or one that was invalid".

Sitting for i'tikaaf in a musalla

Q: May the sunnah i'tikaaf in Ramadhan be held in a facility which accommodates and facilitates the 5 times salaah, including the jumuah salaahs. This is presently a musallah which caters for the residents in the area, over 300 Muslim homes. Consent dues have been granted already for the musallah to continue, alhamdulillah. The nearest masjid is about 4 Kms away which has a limited space for the mu'takifeen. Kindly advise if we could hold the sunnah i'tikaaf for the musallees of the area?