Paving paint would be a cheaper option, Modwood is expensive but there is no maintenance, you could you use just ordinary timber decking for a timber look as well but it won't be as inexpensive as paint obviously. I think paint will look cheap. If it was me and I only had a choice between painting the tiles or leaving them as is, I'd leave them as is. I'd worry that it would scratch off the tiles especially on the ends. I used to have a garage painted in grey paving paint, it was very Matt looking, not shiny and the grey looked really grubby after a while. The tiles may not be your favourite part of the porch but make the decorating items the feature or save up and get them replaced with a grey tile you love. It's a small area so it shouldn't cost the earth. Do the removal yourself which would save you some money. It would really update the front of your house.

Hello Tanya, oh dear did the pup do that? He/she looks a little like "wasn meee!!!" Could you extend or add to the timber platform to create a safer entry platform, say bring it out along the wall & then steps up/down? The door & old glass window might be nicer replaced with a combined door & window or door & louvre unit depending on your privacy/budget requirements. Or a double door opening to a full width platform & then steps if you like. This could possibly be angled too for interest & with plants, water feature & platforms rather than stairs could be an interesting way to deal with the "oh dear, wasn meee!"

Looks amazing! A great fresh update to the area. Jealous that you walk into those high ceilings everyday! Post more pictures!

You could try succulents,sansivera,or if you have trouble getting plants why not try some of the fabulous ‘fake’ plants that are available now, They are so real you will have to stop yourself watering them. Choose planters in similar colour and various sizes , could look gorgeous..