Victorian pitbull female.. love bug (Panacea)

We adopted marley last year.
.
shes a super sweet love bug( to people).
.
gets along with bigger dogs but doesnt love lil dogs.
.
shes 4-5 yrs old.
.
fixed.
.
had puppies so shes a mother hen.
.
extreemly protective except for all the noise she can make vicious just isnt in her and she drops her head and bellies up once a person gets within 6 feet of her… shes very well trained.
.
will even off leash heel.
.
in a dead run after a cat she will stop on a dime if you tell her no.
.
we live in a small 20’ RV and shes just too big.
.
we are also both old.
.
the dog is oxen strong and wiggle machine.
.
we cant keep her any longer.
.
shes completly free to a good home.
.
she comes with full harness.
.
cold weather jacket and dog crate