My personal and professional advise is to get your BSN sooner than later. A number of reasons why...
First, as stated above (and an excellent point), is that it is much easier to focus on your education when you don't have other responsibilities (children, the laundry of an entire family, husbands, etc). Overwhelmingly, my students say they wish they'd finished their BSN's when they were done with their RN's before the kids came, etc.
Second, the sooner you start , the sooner you finish, and then you are ready whenever you either want a different position, are forced to take a different position because of injury or allergy (trust me, I see enough of this), start having children and want a nursing position either off the floor and/or with hours that do not include weekends/holidays.
Third, positions once secured by experience are now being secured by education. In many areas (geographically, with the area getting bigger all the time), you must now have a minimum of a BSN if you want to go to infection control, wound care, case management, floor director, nursing education, etc. I have a number of students who a) have lost out on positions due to education even though they had more experience, and b) are in management or other positions that their employers are now requiring a BSN in order to stay in those positions.
Many hospitals now seeking magnet status also want nurses with more education at the bedside. They want nurses with a BSN or MSN.
Those are just a few of the things I can think of. The bottom line is that you increase your knowledge and you also increase your career opportunities. You are simply preparing your self for more options if you want or need them, and that is just plain smart. With your RN, you have a great foundation that nothing can replace and an ADN degree is extremely valuable. You would just be expanding what you have already learned, taking things to a deeper level.
I wish you the best with your decision. You are supported with whatever you decide!