Can't help with the pricing on your 50 hour service, but I would strongly recommend doing all that it says in your manual as I'm sure it will tell you to change the hydraulic oil & filters as well as the engine oil & filter. The main benefit from this major service so early is to rid the systems of all kinds of contaminates from manufacturing & assembly. No matter how meticulous an assembly process is, there will be metal contaminates, sand from castings, pieces of rubber hose, pieces of silicone sealant etc. etc. Hopefully all of these will be inbedded in those filters you are changing and you'll have clean fluid systems so you don't damage very close tolerance parts throughout the systems. Also your manual should tell you to check tightness of bolts everywhere - reasons for this should be obvious, new parts wear-in, torqueing of some fastners might have been missed in assembly, vibration etc. If you are experienced enough, you can shop around for most of the filters & hydraulic & engine oil and do it yourself and save quite a bit. Trans/hydraulic oil varies greatly in price - shop around some and you can usually find it for about $25 for 5 gallons. Napa is starting to carry some filters for Mahindra - check with them. If you don't feel qualified to do it yourself, hopefully you have a good dealer that will treat you right. Whatever the case, don't put this service off - it is one of the most important ones to do.