2001 Triton V10 motorhome barely turns over

2001 Triton V10 motorhome turns over barely like it’s jammed

So many could be thoughts. Timing slipped, bad battery or connections, no oil, how long since it ran? Rusted cylinders, bad starter motor,

How many miles in it? When was the last time you started it? Have you checked oil level lately?

Has it been parked for a while as in storage for a few week’s or month’s?