N400 - 1 Envelope for Family??

[permres]

My wife and I became Permanent Residents on January 10, 2001 and are thinking of applying on October 10 this year. Should we send our applications in the same envelope or two different envelopes?

Any idea how long it will take in houston, Texas?

[immihelp]

1. 2 different envelopes.

2. Look at http://www.immihelp.com/tracker