For someone who takes as much interest in Non-League Football as you do, not to be aware of ground grading regulations. The ground grading rules make no mention of needing your own ground. I'm sure that we can all think of a club at the highest levels who groundshare.
The main criteria are that you have seven year tenure and that the facilities of the ground shared or owned or otherwise are up to specified levels.
The hostility was because it looked like you were taking a swipe at Chelmsford for no reason. Beware taking swipes before the 5th of May. They have a habit of biting you somewhere painful - at this stage of the season I'd rather be in our position than yours.