No, not easy to replace IMO. Pull up some pic's of "tie rods" big pain in the rear to remove and replace.
I jack up the front just a little to get some weight off and give maybe 3 shots(from manual gun) before rubber starts to puff up just a little and then I stop.
Every other oil change. If I recall right, maint guide said every 3,500 miles but found that to be over doing it.
"Is it normal" one of mine also leaks grease because I think I put to much in couple years ago.
There are only 2 places in town that have lift big enough for MH (height wise) and seldom see RV on it. I think 80% of people don't bother or don't know they are even there. Or maybe an oil change place has already blown theirs out.
"Would I need an alignment afterwards?" Yes IMO, even if you counted every turn of tie rod when taking off and putting new back on, I would want to make sure it was aligned after putting in all that work. When I called for an estimate for mine they wanted almost $700 including shocks.
If it were me...I would just put enough grease to feel or see rubber start to puff up and watch front end wear. If it was blowing out all grease, there would be more of a mess.
"I just want to make sure they are safe?"
What would make them "unsafe"? They are two machined surfaces that have metal to metal contact so grease is put in to cut down on wear between 2 metal surfaces IMO
I also don't rotate my tires because they age(time out, not mileage out) and have not seen any bad wear on front tires.
Hope an expert chimes in, I'm the back yard "do it yourself" type. Wish my underneath looked as good as yours.
Usually grease mine when oil is draining. In your 3rd pic down, that rubber bushing for stabilizer bar, I've replaced it 2 times on right side on once on right rear. Not hard to replace but wonder why I chew thru them on mine.
2003 Majestic 23P... Northwest travel machine
2013 Arctic Fox 25W... Wife "doll house" for longer snowbird trips
2001 "The Mighty Dodge"... tow vehicle for "doll house"