Not a gen1 lair, but am starting to slowly buy and more of them!! Okay, so I have a few tips you could try:
- First of all, I completely agree with @/Shian, matchy XYZs are wayyyy more fun than doubles or triples, and cost less!!
- Try to remember/keep a list of notable dates (The major holidays, festivals, and things like 4/20, Pi day, and other smaller but notable days), some people love doing mass hatches and will usually post gen1s they didn't notice the hidden beauty of for fodder price on the AH
- Gem genes r nice, sure, but avoid them if you can!! Most of my gened gen1s are fantastic even with treasure genes!! It's less expensive and the treasure genes tend to have more accent colours to make unruly colour combos work, prime example of this being one of my gen1s Sparkie:
- Gen1 wildclaws are a bit overdone at this point in my opinion, other breeds are awesome too, and are cheaper!!
- Baldwining is a very good way of getting genes!! Don't buy the ones you can brew with Baldwin from the AH, chances are they're overpriced and brewing genes is a great way to gain EXP with Baldwin!! Not only is it cheaper, but you get to be able to brew new genes that come out at high levels!!
- Save. Impulses are tempting, but keep your goals in mind. Projects stack up easy, and the more gen1s you buy, the more you have to worry about genes. Work on a handful at a time, and try to keep away from gem stuff!!
- 6 apparel slots work just fine!! Keeping the limited-ness in mind is a good way to get creative!! Besides, more slots means more apparel and more costs.
- UMs/UMAs are nice, but not necessary all the time!! Plenty of festival skins work great!! Again, I'm gonna point out my gen1 Sparkie above, he's wearing a festival skin from Brightshine Jubilee 2016!!
Hope these helped, and good luck with getting a gen1 lair!! It's an awesome goal and as much as a challenge it is, it's a huge thing to be proud of!! :D