Project design with minimum cost

[Daljeet12]

if your client want to control five light bulb, two ceiling fan using mobile app wirelessly

How do you design projrct with minimum cost ?

Ceiling fan technical specification
Rated voltage : 220-240 v, AC, 50 Hz.
Power consumption: Not more than 60 watts.

light bulb technical specifications
Rated voltage : 220-240 v, AC, 50 Hz.
Power consumption: Not more than 10 watts.

Is this possible to develop under $12 to $8 ? if no then suggest minimum cost for project ?

My question is mainly focused to get information on how do you design project with minimum cost. I don't really want to develop it. I just want to see your approch

 

[Martaine2005]

if your client want to control five light bulb, two ceiling fan using mobile app wirelessly

Why bother?
Plenty of proven apps in conjunction with home automation already exist. The receivers for lighting can be as cheap as £8.
Are you coding a new app?

Martin

 

[Daljeet12]

Why bother?
Plenty of proven apps in conjunction with home automation already exist. The receivers for lighting can be as cheap as £8.
Are you coding a new app?

Martin

As I said before I just want to see your approach, I am not going to write any code, nor developing real project

If you are an engineer and I am your client. I am asking you what will be the minimum estimated cost to complete this project

 

[Martaine2005]

A one off project would be very expensive if designed solely (from scratch) for one customer. Coding, receiver design, components, PCB design and manufacture, safety and emissions compliance etc etc.

Martin

 

[Nanren888]

Wemo + Sonoff + free apps.
or
Wemo + smart bulbs + free apps.
.
Development costs frequently means use what's available. It's expensive to reinvent the wheel.
How? The normal ways. You do the sums
Each option gets an estimate of unit cost, manufacture cost & development costs & support costs.
You have in hand an estimate of the projected numbers of units & anticipated unit cost that can support the business proposition.
For small numbers this usually restricts design/development time significantly: engineering time gets expensive quickly.
Are you prepared to contract to places where the development cost is lower?

 

[Bluejets]

Start by sending me $1000.00 and we'll go from there......