how long does one stay

how long does one stay at their very frst nursing job?
I have been at my one and only job since july......tho i do love it and the people i work with and i LOVE my residents to death,but i need a change......the morale at this place is getting lower and lower.....heres why....
i work in a mentally retarded home type for 12 residents who are very medically frail.....no onw walks,all g-j tube,trachs....etc....i love it....i knew it the first time i toured the place....anyway.....they hired 5 new LPNS from our graduating class.....which is kind of cool going to school with them,then working with them....there is this one gal,who lacks a work ethic.....the seasoned nurses see this,they have complained to the supers with nothing done......i have worked with this girl some,she sits and watches movies,maybe puts one person to bed,or gets one up,then sits some more....there are only nurses who work at our house and we do it ALL......she does nothng to help with laudry,she is in the kitchen eating 2-3 times for an hour at a time......now the seasoned nurses are neglecting their work as well.....til something gets done.,which i dont see happening...i really dont like walking into work anymore cause i never know what i will walk into......one seasoned nurse called in one night just cause this gal was on......i was on and she did NOTHING!......so anyway.....i only work 20 hrs a week,well....i nver just work 20 as they are always looking for coverage,so i go in when i can...like when my kids are at school and i dont need to be home.....i applied for another job..it is a school nurse type...it is for preshoolers with disabilities.....i would work in a center plus do some home visits...it follows the school schedule...summers off.....the pay is almost 3 dollars less.....this is a mon-fr job,30 hrs a week....weekends off,i work 3 weekends now....those are my hrs infact...8-4 sat and sun,and mon 6-10.......i am not sure if i will even get this job as they really want an RN,but i do not see an RN wanting this job with the low pay.....i also have a degree in early childhood which may help me too......not sure what i want to do....like i said...i do like what i do now....it is hard rewarding work.....but one person makes it stink.......for everyone.....us new nurses are on probation for yr...ya think they would see the not so good workers and get rid of them before the union can fight for them.....makes sense to me......

so should i stick it out,or if offered this job take it.....i do have an interview......any suggestions on interveiwing would be helpful too.....i havent worked in 20 yrs.....i am so new to this....since it is with preschooler i should probably know the normals vitals for kids eh? and CPR for kids too......well... know i know them..they are in to the back of my brain...i just need to move them forward.....

thanks for listening