Is property development a good business?

[Mariagatzs12]

My parents are thinking of giving me around £200k to start my own property development business. I would create a company and my husband would become the company's employee as a PM.

We were thinking of buying a house for say £150k, invest 25k and then sell it for £200k. I know it depends on the property and the are, but does that sound more or less accurate? My husband's salary would be whatever the profit is up to £25k. Whatever is left would be reinvested and so on and so forth.

According to my maths, it takes about 4-5 years to make enough for doing two properties simultaneously and that's when the good money starts to come in.

Am I being delusional? My mom is on board but I have to present my "business proposal" to my dad who believes it's a good business but he's had businesses of his own so likes everything to be well structured and planned.

I have worked in the property industry for about 80 billion years, and it’s nowhere near as lucrative as it used to be. The recent changes in tax laws mean it’s really hard to turn a meaningful profit unless you are working at huge margins (ie buying massively below market value where you are competeting with CBCs who will offer the same but can complete in 14 days or auction companies).
You are unlikely to buy a 150k property, spend 25k and sell it for 200k in the current market too.

The only people I know who make real money buy at auction or convert commercial premises into flats. They are also usually RICS qualified.