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This appears to be an infestation of Palm Scale.

This article will help you.

https://www.gardeningknowhow.com/houseplants/palms/sticky-palm-tree-leaves-treatment-for-palm-scale.htm

Yes, it's normal for the lower fronds to yellow and then dry to brown as the palm puts out newer growth at the top.

As the lower dead fronds develop in numbers and form a dry heavy "skirt", you can choose to let them stay for a natural look, like the native California fan palms in Palm Canyon up the road from you in Palm Springs. Or you can prune them off or have a tree service do it, for a cleaner look.

If you think the yellowing is excessive, and it involves the fronds midway up into the foliar crown it could be due to a nutritional deficiency. Using a palm fertilizer and at least once or twice a month deep watering is a good idea.

https://www.gardeningknowhow.com/houseplants/fan-palm/growing-mexican-fan-palms.htm

This article has some ideas for you.

https://www.gardeningknowhow.com/houseplants/hpgen/how-to-clean-houseplants.htm

I'm not familiar with how much rootball comes with a 30 year old palm tree but I imagine it's a lot and most needs to come out and the bed refilled with more soil. If a sharp spade doesn't do the trick, try using a pitchfork to loosen up the roots. You also can use a rototiller if you have access to one.

There are many cultivars of Vanda that do not bloom at all! You will have to check with the grower, or place that you purchased to know which variety that you have.

If you know that this is a blooming type, then there could be environmental factors, such as cold winters, or too much sun. Lack of humidity will also cause this, as can over or under fertilizing.

This article will help you to grow them: https://www.gardeningknowhow.com/ornamental/flowers/orchids/vanda-orchid-care.htm

This looks like a Cordyline australis or commonly called cabbage palm. You can collect the seeds if you'd like to grow new plants. If not, just trim them off if you don't like the appearance.

https://selectree.calpoly.edu/tree-detail/cordyline-australis