There was a time in my life when i could only afford one bike at a time.
I rode predominately mx and practice day mx, but i was up for a hare scrambles , a trail ride, whatever went on in my area at any particular time.
I have ridden RM 125's , KX 500's, RM 250's and YZ 250's on the same trails, tracks , etc. ---- maybe ignorance was bliss. But my mx bike's suspension was fine for me with maybe a few clicks of the compression/rebound ---- it probably wasn't ideal, but it was what i had and i compensated with my technique
---- i could charge sand whoops on a scrambles course full speed with mx settings, but my softly suspended KX500 i would have to back off, but made up for it in other areas
----- your a young guy -- most of us didnt start out with purpose built trail machines (well, some did i guess) --- we used our MX bikes for everything -- just being careful not to run out of gas on long trail loops
----- I am somewhat spoiled now -- i view a Rekluse
clutch as an essential for me, and my weight demands that i have the suspension tuned up by a pro, and i am considering building my 2 stroke into a purpose built trail bike too (i think i mentioned that earlier) --- but this was not always the case ---- For years i just had 1 decent bike that i used for everything, and life was good. --- i will add that i am primarilly a moto guy , but have competed and done well in hare scrambles (local enduros not so much -- timekeeping is lost on me -- but i can blitz
a special test) -- have done well in GP ytype events --- all on the same bike, as well as group trail rides. I didnt even sweat the tires too much then, i just dealt with whatever i had -- if i had hardpack tires, i would slide around in the slimy stuff a bit and life was still good -- but i normally run an intermediate tire because Oklahoma tracks can range from blue groove hardpack to deep , rutted out sandy dirt on the same track.
Keep that in mind - most of us have been there. A sweet KTM XC-W would be trick, but a $1500 MX bike will get you out there --- ride 'em all for a couple of years, then decide if you want to specialize.