Some are a lot easier than others to grow without special setups. Phals, in general, grow easily under house conditions. They like the same temperatures that we do, don't need a lot of light (but likely will benefit from some supplemental light to extend the "daylight" period to 12 hours or so), aren't sensitive to water quality. Of your list, Draculas would be the most difficult - they need pure water, and want to stay damp, but even trickier, some (but not all) grow their flowers downward or to the side, so need to grow in hanging baskets. There are some species that are better-behaved (growing at the base of the plant above the medium) so you'd have to really do some research there. The others, everything in between. For Cattleyas, consider the "mini-Catts" , species and hybrids. Check out
Sunset Valley Orchids
For fertilizer, orchids (mostly) grow very slowly and so don't need much. Get the rest of the culture right, fertilizer is the "fine tuning". Lots of research to do... and lots of fun in your future.
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